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Vanilla blooms abound!

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This past December, Smithsonian Gardens large trellised specimen of Vanilla pompona graced our greenhouses with luxurious blooms. Beautiful umbels of impressive, successively blooming flowers appeared at every leaf node on this huge vining orchid. Even though each individual flower lasts less than 24 hours, so many new blooms opened daily that it was a true spectacle for several weeks. A sister species to the better known Vanilla planifolia, the source of the  delicious flavoring we all know and love, V. pompona differs in having a much larger, gullet shaped lip. Its seed pods are also used to make a type of vanilla extract, though only locally in Costa Rica and Panama where it grows. Many Vanilla species occur in tropical regions around the world (circumtropical) and therefore are thought to be among the most ancient of orchids, perhaps with a common ancestor existing when the continents were contiguous. Most of these other species are not used for flavoring.

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With rampantly growing vines, these orchids climb quickly and become massive specimens in a short time. Generally, they will only bloom when they are very large and mature. Like a philodendron, their plant habit is a combination of terrestrial and epiphytic. Starting as terrestrial plants with thick fibrous roots, aerial roots arising from the leaf axils clasp the sides of trees as they climb upward searching for higher light in which to bloom. They are easy to propagate from cuttings, but as with any succulent, it is best to let the cuts callous for a few days before planting them or they are sure to rot. Indeed, Vanilla plants in Madagascar plantations have fallen prey to a fungal disease in recent years.  We produce pods on our plants by pollinating the flowers by hand (“selfing”) as they do in vanilla plantations in Madagascar and the Mascarene Islands.

– Tom Mirenda, Smithsonian Gardens Orchid Collection Specialist 

January 10, 2017 at 3:49 pm Leave a comment

Creating an insect habitat in the Ripley Garden

Everyone needs a warm place to snuggle up for winter. That includes members of the insect world! With this in mind, my coworkers and I created a beautiful overwintering habitat for bugs in the Ripley Garden! Call it a Bug-A-bode. Or a Bug House. Or an insect-ominium. No matter what you call it, hopefully it will attract many welcome residents!

In natural settings, insects find cracks and crevices to nestle into. Adult insects frequently lay eggs in the most protected spot they can find, then go off to die, hoping that this precious cargo will make it through the winter to sustain the insect population. However, in urban areas with miles of pavement and neatly manicured gardens, insects face a significant challenge because there are few overwintering sites left for them.

Why are insects important? Basically they are the foundation of our entire ecosystem.  Insects pollinate the food we eat, serve as food for birds and other animals, and help decompose dead material. A world without insects would be quite bleak. To help bolster the essential insect population, gardeners all over the world create all kinds of bug sanctuaries. Some are as simple as not cleaning up a garden in the fall, and leaving dried plant materials standing over the winter. Or leaving a pile of twigs, stems, leaves and such in a back corner of the garden. Or keeping bundles of hollow stems tucked around so that insects can overwinter or lay their eggs in the pithy stems.

I wanted to create such a sanctuary in the Ripley Garden, but I also wanted it to be attractive and functional. A visual cruise around the Internet yielded several ideas. In the end, I was inspired by a design created by master builder Kevin Smith for Flora Grubb Gardens in San Francisco.

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Inspiration from Flora Grubb Gardens

Now I just needed natural materials to fill it with – so off I went hiking over the Thanksgiving holiday to procure a carload of wild materials of various textures and colors (thank you to my dear husband who let me do this to his new car!).

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The results of hiking with a horticulturist! 

Next was a trip to the local hardware store to get some basic supplies (untreated lumber, screws, and copper flashing) and then my talented colleague Rick Shilling went to work building boxes. We wanted the depth of the box to be 6,” so first Rick created the outer frame and attached it to a backing of plywood.  Then he crafted individual boxes of various sizes that we placed inside the outer frame and moved around until we liked the visual effect, then fastened them down using a nail gun. To give the habitat an artistic finish we added copper flashing to the face of each compartment before filling the boxes. From there it was just a matter of playing with the materials to create a pleasing collage, and figuring out how to secure the materials in place so they would not fall out.

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Construction in progress! 

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Construction in progress

Rick devised a way of installing some Chamaecyparis trunks in the two outermost compartments. The other compartments were filled by Smithsonian Gardens new Integrated Pest Manager Holly Walker. With additional manpower from other team members, the box was installed in the garden, and presto! An amazing insect habitat that is not only functional for the bugs, but artistic to boot! A huge thank you to all of my coworkers, especially my trusted co-engineer, Rick Shilling, for all of their help.

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Installation in the Ripley Garden. Thanks to Matt Huber, Rick Shilling, Mike Guetig, and Nick Guy for their installation assistance!

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The finished piece! 

If you’re looking to build your own insect house, it does not need to be this elaborate. I have installed a few simpler versions in the Ripley Garden. For example, a pot filled with acorn tops protected with wire mesh to keep animals out or a bundle of bamboo can also do the trick.

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Simpler insect hotels in the Ripley Garden

Or the easiest bug habitat of all is simply to leave your garden a little messy over the winter to provide our much needed insect population with some warm shelter during the cold frosty months.

– Janet Draper, Smithsonian Gardens Horticulturist 

January 4, 2017 at 1:19 pm 4 comments

Brassavola nodosa (the Lady of the Night orchid)

Even though they are not especially rare or particularly showy, orchids from the genus Brassavola are quite popular. These sturdy, succulent, epiphytic plants live in a variety of habitats throughout Central and South America. Due to their wide-ranging prevalence and adaptability, they are easy to find in and out of the wild. Growing contentedly in bright shade to high light conditions just short of full sun, and adapting well to intermediate to warm growing conditions, these plants often grow into lush specimens. Free flowering, they usually bloom at least twice a year on their newest growths. Smithsonian Gardens is lucky to have several different clones of this species in its Orchid Collection, many of which have grown into massive, spectacularly blooming specimens.

Brassavola nodosa

Brassavola nodosa’s supremely elegant, ghostly white flowers exhibit a pollination strategy, similar to Darwin’s Orchid (Angraecum sesquipedale). Pale colors show up better in the moonlight, and this feature–combined with a sweet, wafting crepuscular or nocturnal fragrance–ensures that the blossoms can be found easily by their pollination partners.

-Tom Mirenda, Smithsonian Gardens Orchid Specialist

November 22, 2016 at 7:51 am Leave a comment

Milkweeds and Monarchs

It is such a fabulous time of the year in the gardens!  The heat has finally stalled out (yeah!) and the gardens are lush and glorious. The highlight for me in the Ripley Garden is the diversity of birds, butterflies, bees, wasps and other creatures that bring the garden to life. Seeing numerous monarch butterflies in the garden makes my heart sing, since the overall population has declined in recent years due to habitat destruction and the subsequent loss of food sources.

Monarchs feed primarily on milkweed (Asclepias family). These plants usually like sunny, disturbed sites, so they are often found along roadways. The most frequent roadside milkweed is A. syriaca, a 3’-5’ tall plant which multiplies both by runners and by seed.

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Asclepias syriaca

Unfortunately, roadside plants are often killed chemically or mowed down just as the butterflies are seeking food and nectar sources. Knowing the monarch population is in peril, I planted a variety of milkweeds in the Ripley Garden to nurture the population and educate my visitors about some planting options for their gardens.

There’s the readily available ‘Butterfly weed,’ Asclepias tuberosa, which blooms a vibrant orange color in June and July, sometimes repeating a bloom slightly later. For the most part, it is not in bloom when the adults are present and needing nectar. However, the adults do lay eggs on the foliage, and the emerging larvae will strip the plants clean rather quickly.

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Asclepias tuberosa

I also have Asclepias verticillata, a Midwestern native that is only about 1′-1.5’ tall, and spreads by underground stolons (horizontal runners) in dry rocky soils to form a colony.  The white flowers are borne on the top of the stem in clusters.

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Asclepias verticillata

Asclepias purpurascens, a real stunner blooming in early June with glorious hot raspberry-colored flowers, is another milkweed native to the U.S. that I am growing. It is quite rare in cultivation due to seed viability issues, but hopefully this will soon be solved. Since it is past bloom before adult butterflies appear, this milkweed does not serve as a nectar source for monarchs and I have not witnessed any larvae feeding on it.

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Asclepias purpurascens 

The milkweed which seems to be getting ALL the attention of the monarchs in the Ripley Garden is… drum roll please….  Asclepias curassavica. This plant is native to South America and is hardy only in plant hardiness zones 9 and 10, though it has spread and established throughout tropical regions. In Washington D.C., the plant sows by seed from year to year. The plants will reach anywhere from 1’-5’ tall, and thrive best in full sun with average moisture.

Asclepias curassavica is a tropical milkweed which produces blooms of brilliant oranges and reds between June and October, so it provides both nectar for adults and food for caterpillars. Many of the plants in the Ripley Garden are totally bare, just a stripped stalk remaining after some very hungry caterpillars have devoured everything they could munch. When the time is right, the caterpillars find a secure place where they can hang freely and create a chrysalis.

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Monarch caterpillars on Asclepias curassavica

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Monarch caterpillars on Asclepias curassavica 

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A monarch caterpillar hanging on the underside of a Sweet Potato Vine ready to begin the transformation into a chrysalis.

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Fully formed chrysalis 

I allowed the Asclepias curassavica to selfsow in an area up against the Arts and Industries Building, and have been delighted to see a number of caterpillars munching away. But I wasn’t finding any chrysalises, until recently. Hiding in plain sight, the caterpillars climbed up the brick wall to transform while hanging in the window wells!

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Chrysalises in a window well

In this window well alone, there are four chrysalises that have not pupated, and three remnants where butterflies have already emerged! The more I started looking, and really seeing, I realized that I created a perfect nursery for the monarchs, without even trying!

I am so delighted that the monarchs, and a plethora of other insects, call the Ripley Garden home!  Your garden can also be an ideal butterfly habitat. Avoid the use of toxic chemicals (this includes mosquito sprays!) and plant a wide variety of plants known to be beneficial to insects.  Plant it and they WILL come!

– Janet Draper, Smithsonian Gardens Horticulturist 

 

 

September 28, 2016 at 4:31 pm Leave a comment

Garden Inspirations: Our Latest Exhibit

Last year, I had the opportunity to design an exhibit in the Ripley Center, “Design for Small Spaces.” Featuring stumpery, fairy gardens, green walls, terrariums and dish gardens, I hoped to inspire visitors with some ideas they could try at home, even in the smallest of spaces. A favorite component of the exhibit was the fairy garden vignette. With this year’s latest installation, I wanted to delve deeper into the world of miniature gardening.

The new exhibit, “Garden Inspirations,” opened Labor Day weekend in the Ripley Center. Images from the Smithsonian’s Archives of American Gardens were used to inspire five miniature landscapes.  Selecting images from the Archives was no easy task. I spent hours narrowing down options from the thousands available in that repository to find “the perfect five” to miniaturize. In my search, I was looking for images that not only documented a range of gardens, but ones I also felt confident in transforming. Which images had features I could replicate with small plants and miniature furniture and would do well in low-light conditions? Ultimately, I found five images I not only fell in love with, but met those requirements.

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The Rossetti Garden, Fairfield, Conneticut. June 2013. Stacy Bass, photographer. Archives of American Gardens, Garden Club of America Collection (left). “Garden Inspirations” miniature interpretation (right).

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Hicks Garden, Jacksonville, Florida. April 2010. Charles Burlingame, photographer. Archives of American Gardens, Garden Club of America Collection. 

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Fifth Season, Barrington, Illinois. June 2007. Eric W. Craig, photographer. Archives of American Gardens, Garden Club of America Collection (left). “Garden Inspirations” miniature interpretation (right). 

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The Community Garden, Millburn, New Jersey. July 2012. Lisa Gadsen, photographer. Archives of American Gardens, Garden Club of America Collection. 

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The Gardens at Harmony Woods, Mendocino, California. March 2012. Sandy Scott, photographer. Archives of American Gardens, Garden Club of America Collection. 

I hope you’ll have a chance to visit “Garden Inspirations” and find inspiration in elements in the pictured gardens for your own plantings, as I did in the miniature displays. What colors, textures, scents, or features might you add to your own garden?

Would you like your garden to inspire other gardeners? Add images and a story about your garden to Community of Gardens, a digital home for sharing and preserving stories of gardens and the gardeners who make them grow. Anyone can add their story, which means that an account of your parents’ backyard wedding, your grandmother’s tomatoes, or your neighborhood’s community garden can become a part of the Smithsonian. Visit communityofgardens.si.edu to get started.

– Alex Thompson, Smithsonian Gardens Horticulturist 

September 11, 2016 at 5:10 pm Leave a comment

On display: Miltonia moreliana

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A Miltonia moreliana is currently on view at the National Museum of American History

Miltonia moreliana is a species of orchid found in Venezuela and Brazil that blooms reliably in the Smithsonian Gardens Orchid Collection in late summer or early fall. Named originally for a French orchid nursery around 1800, ‘Mora’ is also the Spanish word for blackberries which share this vibrant color. For many years this species was considered a variety of the highly variable Miltonia spectabilis which has many color forms. However, Miltonia moreliana was described as a separate species back in 1848 and is considered distinct from the other color forms.

Many confuse the vigorous, lowland, warmer-growing Miltonias from Brazil with the finicky, upper-elevation Miltoniopsis that thrive in the Andes Mountains in Colombia, Ecuador and Peru. While the flowers are superficially similar, they are not closely related and have different cultural requirements. Brazilian Miltonias have long rhizomes (underground stems) between their growths and become large specimens quickly. Because of their creeping habit, new growths often wander out of their pots. Larger plants, such as this Miltonia need frequent repotting and occasional division to stay healthy. Many intergeneric (a cross between plants in two different genera) hybrids with Brassia and Oncidium have been bred using this species and the results virtually always exhibit this delightful coloration. Some examples of these beautiful and popular hybrids can be seen below.

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Aliceara Marfitch ‘Howard’s Dream’ 

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Miltonia blunti x moreliana

– Tom Mirenda, Smithsonian Gardens Orchid Collection Specialist 

September 7, 2016 at 4:24 pm Leave a comment

Far Out Foods

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Star Trek: The Motion Picture lunchbox by King Seeley Thermos, 1979 (Photo credit: National Museum of American History) 

What do you usually pack to eat on a long trip? Maybe a few granola bars and a couple bottles of water?

Thanks to detailed records kept by the Pilgrims, we know that they brought a large quantity of seeds with them during their voyage on the Mayflower to the New World. These seeds were used to start gardens that sustained the new colony. They produced quick-growing crops like mustard, protein-rich peas, and carbohydrates from wheat and oats.

On an expedition to the Arctic in 1819, British sea captain Sir William Edward Parry fortuitously brought along a pocketful of cress and mustard seeds. When his ship the H.M.S Hecla was stuck in the polar ice for nine months, these sprouts helped prevent scurvy amongst the crew.

The crew of Expedition 44 to the International Space Station in 2015 also packed along seeds. Astronauts Scott Kelly and Kjell Lindgren became the first Americans to ever eat food grown in space–a leafy romaine lettuce salad.

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Crop of “Outredgeous” red romaine lettuce grown on the International Space Station. (Photo credit: NASA)

According to the sci-fi classic Star Trek, we are still a few centuries away from having a food replicator aboard a starship.  However, NASA and partnering space agencies are currently developing gardens that will one day sustain life on a space station and maybe even a Mars colony.

So, the next time you pack food for a long journey, you may want to choose some hearty granola bars. You know, the ones with the seeds in them…just in case.

To learn more about sustaining life in far-out locations come to the Museum Moonshine program at the National Air and Space Museum on September 10, 2016 from 8 to 10 p.m. Museum Moonshine is an evening garden party that celebrates the treasures of Earth and space by highlighting craft food and drink inspired by earthly botanicals and space science. Tickets available here – http://s.si.edu/2beYmHi

– Brett McNish, Smithsonian Gardens Horticulturist 

August 26, 2016 at 11:45 am Leave a comment

A Trip Through New England Gardens

My name is Erin Clark and I’m a horticulturist with Smithsonian Gardens. Each year Smithsonian Gardens sends staff on professional development trips to gather inspiration for the gardens. Thanks to this travel grant, I was able to tour the gardens of New England. From Connecticut and the hills of Vermont to New Hampshire and Massachusetts, the vistas I experienced were vivid and the people I met were warm and welcoming. Many of the gardens I visited in the area showcased the use of plants, something we like to highlight in tours at the National Museum of American History.

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Hill-Stead

I began with a selection of historic gardens in Connecticut. Starting in Hartford, I visited Hill-Stead, a home designed by an architect’s daughter for her wealthy parents in retirement, complete with a sunken garden by Beatrix Farrand. Works by Monet and other artists hang in the house and the hills outside the home used to be a working farm. I toured with Hill-Stead’s head gardener at a time when the roses bloomed in top form.

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Landscape Historian Sheila Wertheimer of the Florence Griswold Museum

At The Florence Griswold Museum I spoke with Landscape Historian Sheila Wertheimer who works with volunteers to ensure that the grounds are beautiful and accurate to their original aesthetic. Sheila enlisted the help of an archaeologist to find the original bed locations. Referencing old photographs and paintings by the artists that flocked to this boarding house turned artists’ colony, she recreated a colonial revival garden, complete with roses, yarrow, and delphiniums. The site now hosts an art gallery and a cafe overlooking the Lieutenant River.

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View of the gardens and barn at The Florence Griswold Museum.

In Massachusetts I visited the campus of Smith College, toured the greenhouse there, and enjoyed the synoptic beds laid out by plant family. Near Massachusetts’ northern border is a place called the Bridge of Flowers where a footbridge stretches across the Deerfield River, adorned in cottage garden flowers and trees reminiscent of Monet’s garden in France.

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Me, about to cross the Bridge of Flowers

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Bridge of Flowers

Next I drove to Tasha Tudor’s Garden in Marlboro, VT. There the famous children’s book illustrator lived a quiet life in a house built by her son. The Tudor family leads a few tours each year and still keeps the house much as the artist did during her lifetime. An entire field of lupine greeted visitors at the gate. The garden’s crab apples and daffodils had long since bloomed, giving way to the exuberance of summer. Tasha’s grandson, Winslow, proudly showed us the gardens and chickens. Seth Tudor, Tasha’s son, showed us the beams of the house he built by hand and the tiny puppet studio that the family used to entertain neighborhood children.

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Amy Tudor (right) and I (left)

Tasha Tudor, born in 1915, had a love of the old way of doing things, and kept goats, churned butter and gardened, all in  late 19th century style dress. There are still notes on the wall with phone numbers, important dates and weather conditions, and sketches of her beloved corgis. A testament to her love of the artistic process, she chose weaving over modern pastimes like watching television and kept two looms that dwarfed the rooms they occupied. Staying there in Vermont among lakes and evergreens, watching the water birds and the sunset, I could understand why Tasha had chosen this place.

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Meeting place for the Tasha Tudor Garden in Marlboro, VT. The cottage garden, with sweeps of lupine and crabapple, is nestled in the forest. Lupine (right) lines a Vermont roadside.

I was off to Portsmouth, New Hampshire the next day, and explored the preserved town of Strawbery Banke (named in the English of the day). It was named for the wild strawberries that grew along the banks, enough to fill the hull of a ship. Several houses and backyard gardens illustrate this site’s 400-year-old history. Erik Wochholz, the Curator of Historic Landscapes at the Strawbery Banke Museum, led me on a tour and we sampled our way through herbs used for brewing and as garnishes. Kids have an opportunity to wander through colonial gardens, explore a WWII-era store, and even do a paleobotany activity examining modern pollen under microscope.

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Herb Garden at Strawbery Banke Museum

John Forti, the Massachusetts Horticultural Society’s Director of Horticulture and Education, met with me for my last stop before heading back to D.C. MHS owns a historic estate next to a soccer park, complete with a grotto, a formal garden and several themed gardens. During the last year, wooden structures and arches have been built and educational interpretation for youth has grown. The veggie garden, next to a peaked frame house built by the monks who once ran the site, is the current domain of several heirloom lettuces, tomatoes, and strawberries, as well as a nesting killdeer.

Heading into the city and to the airport, I was left with beautiful memories of the places I had visited on this whirlwind tour. I learned about the importance plants have in providing a sense of place in a garden.  I saw many different ways of interpreting history with labeling, programs and art. Every place has a different focus, a different plant palette, and a set of people who love it, dedicated to its continuance, much like Smithsonian Gardens.

– Erin Clark, Smithsonian Gardens Horticulturist

 

August 22, 2016 at 2:38 pm Leave a comment

The Critical Importance of Water Quality for Living Collections: Planning Ahead

Objects and artifacts in a museum collection are typically housed in cases and cabinets with drawers or shelves. As a living museum, Smithsonian Gardens’ plant collections are maintained in the landscape and in a large greenhouse facility. Because plants are living specimens that require vitamins, nutrients and other sources of energy, they must be monitored and nurtured daily. Water is a critical component of this care. Photosynthesis, transpiration (water movement through a plant and subsequent evaporation from plant leaves), and the transfer of vitamins and minerals from the soil to the plant are all dependent on the presence of water.

Water quality and availability are key factors to plant maintenance in a public garden. Things like droughts, floods, and other natural disturbances must be considered when developing a plan of care for each garden and/or collection. Throughout its gardens and landscapes, Smithsonian Gardens utilizes an irrigation system that uses 30-50% less water than conventional watering, improves plant growth by extending watering times, prevents soil erosion and nutrient runoff, and ensures that plants are watered without wetting leaves, which helps prevent fungal disease.

Water Harvesting

Irrigation system visible during construction of Folger Rose Garden 

Water quality is also of critical importance when it comes to successful orchid cultivation and maintenance. Orchid species exposed to municipal water–such as that which the Smithsonian Gardens Orchid Collection (SGOC) currently uses–exhibit detrimental physical manifestations caused by the accumulation of salts in the growing medium. These adverse effects include leaf tip burn, decreased plant vigor, reduced blooming, discoloration, and even death.

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Dendrobiums grown with municipal water (left) compared with ones grown with reverse osmosis water. 

To have access to high quality water for the long-term care of SGOC, Smithsonian Gardens recently secured funding from the Smithsonian’s Collections Care and Preservation Fund* to install a customized rainwater harvesting system at its Greenhouse Facility. The system will collect, filter and store rainwater in a large tank or modular chamber. This is a preferable alternative to filtering municipal water for several reasons. First, filtering does not remove all of the added compounds found in municipal water. Additionally, rainwater has a similar pH to that of reverse-osmosis (R/O) water, which is currently used for our most delicate specimens. Smithsonian staff are currently visiting local universities and public gardens with large-scale water harvesting systems to glean ‘lessons learned’ from each project and to determine whether an above-ground or underground cistern (water storage tank) makes the most sense for SGOC’s year-round water use.

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Example of above-ground cistern at the University of Maryland. 

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Example of a modular storage chamber which allows for a much shallower excavation and ease of transport to a site. 

The plan is for rainwater to be collected from the roof of the Smithsonian Gardens Greenhouse Facility then pumped under pressure from a cistern through a filtration system to remove particles at the micron level. From there, the rainwater will be disinfected using ultraviolet light to destroy any microorganisms that are detrimental to orchid health. Finally, the rainwater will be pumped to a hose connector in each of the four orchid greenhouses for use when staff are watering.

*This project supports innovative and sustainable collections care which will have a direct, substantial, and permanent impact on the health and preservation of the Smithsonian Gardens Orchid Collection. It was made possible with financial support from the Smithsonian Collections Care and Preservation Fund, administered by the Smithsonian’s National Collections Program and the Smithsonian Collections Advisory Committee.

– Sarah Hedean, Living Collections Manager 

 

August 1, 2016 at 12:47 pm Leave a comment

Smithsonian Gardens Receives Grant Award to Fund a Water Conservation Project

In honor of Earth Day, Smithsonian Gardens is proud to announce a $146,200 grant award from Smithsonian Institution’s Collections Care and Preservation Fund for a water conservation project at our Suitland Greenhouse Facility.  The award supports the purchase and installation of a rainwater harvesting system to irrigate the Smithsonian Gardens Orchid Collection by collecting and using rainwater to water the collection rather than municipally-treated water as we use now. This project is a collaboration between Smithsonian Gardens and the Smithsonian Facilities Energy Management Branch of the Systems Engineering Division which is responsible for Smithsonian’s energy use and conservation techniques.

Rainwater harvesting is a technique used for collecting, storing and using rainwater for landscape irrigation and other uses. The rainwater is collected from hard surfaces such as rooftops and is a cost effective method of water conservation.  Rainwater is superior for plant watering because it is free from pollutants like dissolved salts, minerals, and chemicals such as fluoride and chlorine.

Water quality is of critical importance when it comes to successful orchid cultivation and maintenance. Orchid species exposed to municipal water often show detrimental physical manifestations caused by accumulated salts building up in the orchid growing medium. These adverse effects include leaf tip burn, decreased plant vigor, reduced blooming, discoloration, and even death.

Many of the best orchid collections and commercial growers in the United States, Europe, and South America use either purified water or rainwater for irrigating orchids. Switching from municipal water to rainwater is like ‘flipping a switch’ with regard to orchid growth. Seedlings irrigated with rainwater grow two to three times faster and the plants often have cleaner, unblemished foliage. A resent comparison of Atlanta Botanical Garden seedlings sired at the same time as ones grown by Smithsonian Gardens Orchid Collection show they are more than triple the size of those being grown by Smithsonian Gardens. Clear evidence of the need to implement better water quality for the over 8,000 orchids in our collection. We hope to have the new water harvesting and irrigation system installed by the end of this year.

This project celebrates innovation and supports sustainable collections care which will have a direct, substantial, and permanent impact on the health and preservation of the Smithsonian Gardens Orchid Collection. This project received Federal support from the Smithsonian Collections Care and Preservation Fund, administered by the National Collections Program and the Smithsonian Collections Advisory Committee.

-Sarah Hedean, Horticulturist, Smithsonian Gardens Orchid Collection

April 22, 2016 at 8:00 am 2 comments

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