Posts filed under ‘Horticulture’
I had the opportunity to travel to Columbus, Ohio, last July to attend Cultivate ’14. This annual conference is held for people from all aspects of the horticulture industry, including growers, retailers, landscapers, interior plantscapers, floral designers, and educators. With educational sessions, the largest horticultural trade show in North America, wonderful tours to attend, and over 10,000 attendees, there was so much to see and learn while I was there.
As part of the conference, I was fortunate to be able to visit the Franklin Park Conservatory and Botanical Gardens in Columbus. I have always been fond of conservatories and greenhouses, and this one did not disappoint! The conservatory itself, comprised of 8,300 sq. ft. of glass roof space, first opened its doors to the public in 1895 to show off its collection of palms.
One aspect that really drew me in to all of the beautiful plant displays there were the Dale Chihuly glass pieces that were exhibited throughout the conservatory. I learned that Chihuly’s artwork was first displayed in the conservatory in 2003. Because of a marked increase in attendance, the Friends of the Conservatory decided to purchase many of those glass pieces so that they could be shown permanently. There is something about the way the beautiful glass, with its electric colors, reflects the sun in such a gorgeous setting. It warms me from the inside out.
That really got me thinking about how important art is in the garden: bringing these two elements together to draw in people to see the gardens. It is a way for gardeners and plant lovers to come to such a lovely, natural setting to appreciate art. It is equally as valuable to bring lovers of art into a garden setting, which is beautiful and imperfect—quite a different setting to display artwork than the stark white walls that we often see in a gallery—and enable them to appreciate the artwork in a more natural setting. The synergy created by placing these two components of artwork and gardens in the same space makes the combination of the two work that much more effectively together than they would on their own.
We at Smithsonian Gardens are so fortunate to have such a beautiful backdrop in which to display our plants. The museums themselves are works of art, inside and out. We have entire gardens that are dedicated to displaying artwork (such as the Hirshhorn’s Sculpture Garden), and others that are gardens, first and foremost, that also display artwork (the Haupt Garden, American Indian Museum, and Natural History Museum, to name a few).
I work primarily with plants used in interior spaces, and while I can’t necessarily work with “gardens” and artwork, the plants I grow and care for in the Smithsonian greenhouses are used inside the museums where even more pieces of art are displayed. The trip to Franklin Park Conservatory has inspired me to think more creatively about the plants I grow, and to consider new ways in which the plants can be arranged to complement the artwork they will be placed around, or even the space in which the plants will be displayed.
The next time you visit a space that displays horticulture and art, take the time to appreciate how much more you get out of your experience by having both plants and artwork working together.
– Shannon Hill, Greenhouse Horticulturist
They all go to Cultivate ’14 in Columbus, Ohio in July.
I had the wonderful experience of attending Cultivate ’14 in Columbus, Ohio July 12 – 15, 2014. Formally known as the Ohio Short Course, the symposium is one of the largest events in North America. The show is attended by over 9,000 garden retailers, greenhouse growers, landscapers, interior designers, educators, researchers, and many other professionals involved in the green industry.
Top notch educators and speakers are invited to speak on over 140 topics about pest control, new plant varieties, growing techniques, interior design, and green walls. Attendees have the flexibility to attend as many of the seminars as they can. Attending these seminars is a great way to get new ideas on growing techniques, identifying common diseases and insects that may attack greenhouse crops, and even proper techniques on using yellow, sticky insect trap cards.
The trade show is the one of the largest around. I was able to walk around at my leisure and see all of the new and innovative products that are available or will be made available to our industry in the future. The trade show is also a great time to network with sales representatives that I talk to sometimes on a weekly basis. I also establish new relationships with salespeople trying to sell the newest and brightest products in the industry. Personally, the trade show is a wonderful opportunity to “hook up” with former coworkers and sales representatives I have known for over twenty years.
One of the highlights of the show is getting to see many of the new plant varieties and introductions. There are hundreds of new and exciting plants and colors at the show. Aisle after aisle of annuals and perennials line the lobby at the convention center. Many of these new varieties can be seen in the fabulous displays all throughout the show. I gain a ton inspiration when looking at the wonderful new selections and then enjoy bringing all of my inspiration back to share with my coworkers at Smithsonian Gardens.
Another wonderful highlight of the trip is the bus tour to greenhouse operations in the Ohio area. I was able to tour two family owned production/retail facilities. Going on the tours allows me to see what other growers are doing and taking a peek at their innovative ways of producing large quantities of high quality plant material to be sold to retail garden centers. The bus trips also establish relationships with other people in the industry. Conversations are started and soon everyone on the bus seems to know one another. Information and ideas are exchanged while spending most of the day on the bus. These people on the bus come from all over the country. My bus had people that came all the way from Canada and Hawaii!
The really fun part of the trip to Cultivate ’14 was the visit to the Franklin Park Conservatory a couple of miles outside the city limits. Their display of Chihuly glass (more than 3,000 pieces in the permanent collection) was awesome! The plants displays were amazing as well. Highlights of the conservatory included a palm house, a rain forest, a butterfly house, lots of amazing bonsai, and a gift shop and café.
Attending Cultivate is always a wonderful experience. The event is truly a great opportunity to become motivated and inspired by all of the beauty and knowledge the show brings to the green industry and to me.
-Jill Gonzalez, Smithsonian Gardens Horticulturist
In 2012, the Smithsonian Gardens Green Team developed an Eastern Bluebird Trail at our greenhouse complex in Suitland, Maryland. The trail of ten paired nest boxes was designed to support and expand the year-round resident Eastern Bluebird population. By the end of the 2013 nest season, the bluebird population had expanded to about thirty birds.
What happened in 2014? We began monitoring the trail in March, looking for the first signs of nesting behavior. The monitoring continued through July and in that time, no Eastern Bluebirds have been seen at or around the greenhouse complex. We believe the resident population migrated to another location due to a harsh winter of repeated deep Arctic cold blasts starting in late November and persisting through March. In addition to the cold, we believe the bluebirds did not have enough food to support their population.
Bluebirds rely on fruit for more than thirty percent of their diet. In the winter, when insects are scarce, they depend on persistent fruits more than at any other time of year. The SG Green Team is committed to planting more native tree and shrub species around the facility to provide a sustainable winter habitat for the birds. Planting trees and shrubs not only provides food for birds but also provides shelter from harsh winds and cold temperatures.
-Sarah Hedean, SG Green Team Member
Ever heard of the pawpaw tree? Ever tasted its fruit? Did you even know it had fruit? Though it may not have the name recognition of an apple or a peach tree, pawpaw trees have a long and important history in the United States. In 1541, Hernando de Soto observed Mississippi Valley Native Americans growing pawpaws and eating the fruit. According to scientist Neal Peterson, the Spanish mistakenly named the pawpaw fruit “papaya.” Spanish explorers selected this name because they observed pawpaw fruit to have a similar green skin and orange flesh to a papaya. Overtime, the English language transformed the fruit and tree species name from papaya to pawpaw (Asimina triloba).
According to James A. Little in his 1905 A Treatise on the Pawpaw, pawpaw fruit helped sustain Native Americans and early American settlers in times of harvest failure. Little wrote that pawpaw trees needed little maintenance in order to survive in the wild, unlike apple, pear, or peach trees. Thanks to its resilience, Native Americans and early pioneers enjoyed pawpaw fruit as a dependable source of fiber and nourishment. Even members of the Lewis and Clarke Expedition survived on pawpaw fruit during their long journey west in 1804-1806.
Found between Georgia and Northern Michigan, pawpaws extend across eastern portions of the United States. Unlike the tropical members of the Annonaceae family to which it belongs, pawpaw trees thrive in harsh conditions of snow and ice. Despite this resilience, pawpaws still struggle to reproduce. Scientists believe the tree is ineffective at attracting flies and beetles to pollinate its flowers, thus creating challenges for reproduction.
The pawpaw tree produces a very nutritious and delicious fruit, which is actually a berry. The pawpaw berry is also called a “custard apple” and is said to taste like a mix between a banana and a pear, with a hint of vanilla. The name custard apple derives from the creamy texture of the fruit.
Smithsonian Gardens currently has seventeen pawpaw trees in its Tree Collection. They can be found in the Native Landscape garden at the National Museum of the American Indian, the Butterfly Habitat Garden adjacent to the National Museum of Natural History, and the National Air and Space Museum.
Next time you stop by one of the Smithsonian gardens keep an eye out for this beautiful tree with a deliciously-interesting past.
-Jessica Brode, Archives of American Gardens intern
As we gaze around at the beautiful autumn colors that our trees are showing us, we’re trying not to think about the arrival of the cold and snowy weather of winter. However, arrive it will, and now is the time to prepare your trees for those coming winter months. Although all trees are potentially susceptible to winter injury, young and/or thin-barked, and broadleaf evergreen trees require the most preparation.
Excessively cold temperatures, wind, and quick temperature changes can cause drying, browning, and death of evergreen foliage. This problem is most prevalent on broadleaf evergreens such as rhododendrons, laurels, boxwoods, and hollies. To help prevent this damage, construct a barrier of heavy burlap, like a fence, to block drying winds from their prevailing direction. If the entirety of the plant is exposed, loosely wrap it in burlap. In either case, be sure to leave the top of the plant exposed so light and air penetration can still occur. In addition, it is important to keep watering your trees up until the time of the first hard frost. A 4-6 inch layer of mulch over the root zone will also help the soil retain warmth and moisture. (Remember not to pile the mulch up against the trunk of the tree.)
Another issue of concern, which is also caused by rapidly fluctuating temperatures, is sunscald. This occurs when the sun has warmed the trunk of the tree, and then that trunk is rapidly cooled upon sudden shading from a cloud, etc. This condition results in elongated, dried and cracked areas of dead bark. This can be prevented by wrapping the trunk with commercial tree wrap (available at most home and garden centers) or other light-colored material. This will reflect sunlight and keep the bark at a more consistent temperature. The wrap should be placed on the tree in the fall and removed in the spring, after the last frost.
Broadleaf evergreen foliage damage and frost cracks are influenced by many factors, including plant species, location, drainage, natural protection, and how well established a plant is in the landscape. There is no specific temperature at which damage occurs, but if the forecast calls for temperatures below the average seasonal low (29-33°F for Washington, D.C.), it is best to utilize the protection methods outlined above.
Tree branches can be prone to breakage from heaving snow and ice loads and by strong winds. Weakly attached, overextended and broken limbs should be pruned. Trees with an upright form, such as juniper, arborvitae, and clump birch, can be wrapped in burlap, or held together by wrapping the branches collectively with twine or rope. Any wrapping material should be removed in the spring.
When natural food sources grow scarce in the winter, rodents may feed on the young bark and cambial tissue of trees. Plastic tree guards or a cylinder of ¼” wire mesh placed around the trunks of young trees will help prevent this damage. Be sure to remove these guards once the spring has come so the tree does not wind up growing into them.
Trees possess an extraordinary ability to withstand severe winter weather, with some being more hearty than others. However, with proper care and attention, your trees should come through the winter ready to show off their new flowers and foliage for spring.
-Greg Huse, Smithsonian Gardens Arborist & Tree Collection Manager
BOO! In honor of Halloween, we are celebrating another #SpookyPlantsWeek. Here’s our round-up of the weird, creepy, gross, scary, and wonderful plants that we featured on Facebook this week. All can be found growing in our gardens at the Smithsonian museums or in our greenhouses in Maryland.
With Halloween just around the corner and Thanksgiving on our minds already, we are celebrating the season of the pumpkin here at Smithsonian Gardens.
Will you carve a pumpkin for Halloween? Jack-o’-lanterns as we know them today are rooted in European traditions. In Ireland and Scotland, people used turnips and potatoes to make scary faces that would frighten evil spirits. When immigrants from these countries came to America they began using pumpkins, a native fruit.
The modern-day pumpkin pie evolved from early recipes that arrived in the America from England and France. Pumpkins (called “pompons” in French) were stuffed with sweet fillings or were served in a pie crust along with apples. By the mid-nineteenth century the custard-style pumpkin pie (with a bottom crust and no top crust) was a familiar “Yankee” delicacy. This excerpt from the “The Pumpkin” by John Greenleaf Whittier (1850) pretty much sums up how we feel about this gorgeous gourd:
Then thanks for thy present!— none sweeter or better
E’er smoked from an oven or circled a platter!
Fairer hands never wrought at a pastry more fine,
Brighter eyes never watched o’er its baking than thine!
And the prayer, which my mouth is too full to express,
Swells my heart that thy shadow may never be less,
That the days of thy lot may be lengthened below,
And the fame of thy worth like a pumpkin-vine grow,
And thy life be as sweet, and its last sunset sky
Golden-tinted and fair as thy own pumpkin-pie!
Over the years we have grown a variety of heirloom pumpkins in the Victory Garden at the National Museum of American History. This year keep an eye out for the ‘Long Island Cheese,’ pumpkin. Canned pumpkin has been a popular and convenient alternative to fresh pumpkin since the 1920s. For those who have the time to make a pie from scratch this season, Rebecca Sullivan, Fellow in Food History at the National Museum of American History, has a delicious recipe to share with you:
Recipe for Pumpkin Pie
2 cups pumpkin puree (steam 1 ¼ lbs. peeled pumpkin until soft, then puree)
1 ½ cups thickened cream
1 cup brown sugar
1 ½ teaspoons ground cinnamon
1 teaspoon ground ginger
½ teaspoon nutmeg
¼ teaspoon ground cloves
Zest of 1 orange
2 cups plus 2 tablespoons plain flour
1 cup confectioner’s sugar, sifted
¼ lb. unsalted butter (1 stick), chilled, cubed
-Pecan, gingersnap layer and nut topping:
¼ cup pecans, toasted and ground
¼ cup crushed gingersnap cookies
½ cup almonds or in-season nuts
2 tablespoons maple syrup
1 cup light cream
2 tablespoons pure maple syrup
- Starting with the pastry, place the flour and confectioner’s sugar in a food processor and pulse for a few seconds. Add butter and process until the mixture resembles fine breadcrumbs. Add the egg and process until the mixture forms a ball. Cover in plastic wrap and refrigerate for 30 minutes.
- Preheat oven to 350°F. Once chilled, roll pastry out on a lightly floured workbench and use to line a lightly greased 9-inch pie pan. Place back in the fridge for 30 minutes to chill further. Next make the pecan gingersnap layer by toasting the pecans in the oven for 8 minutes or until lightly browned. Cool and then place the pecans, along with the gingersnap cookies, in a food processor and process until finely ground. Press this mixture evenly onto the bottom and up the sides of the unbaked pie crust. Cover and return the pastry to the refrigerator while you make the pumpkin filling.
- Line the pan with baking paper, place the almonds and a drizzle of maple syrup on top of the baking paper and blind-bake for 10 minutes. Take out of the oven and set the nuts aside for later. Increase oven temperature to 420°F. Place pumpkin puree, eggs, cream, sugar and spices in a processor and whiz until smooth. Pour into the tart shell, then bake for 10 minutes. Reduce oven temperature to 300°F and bake for a further 30 minutes. Take out of the oven and sprinkle the nuts on top of the pie, then return to the oven for a remaining 10 minutes. The pie should be just firm when cooked.
- Cool, and then make the maple cream by pouring the cream into a small bowl and mixing with a hand mixer. As the cream starts to thicken, slowly drizzle in the maple syrup and mix until the consistency you desire. Serve the pie in slices with the whipped maple cream.