Posts tagged ‘gardening tips’

Protecting Pollinators

Did you know that this week is National Pollinator Week? Every year organizations devoted to conservation celebrate pollinators and address the urgent issue of declining pollinator and plant populations. Pollination is the process of moving pollen within flowers or from flower to flower, allowing the plants to fertilize and reproduce. This movement can be done by wind, water, or a variety of animals, known as pollinators. Animal pollinators assist about 90% of all flowering plants in their pollination needs.

The Pollinator Cycle (pollinator.org)

This year’s focus is on native orchids, which depend on a variety of animals for pollination. What is particularly interesting about the relationships between orchids and their pollinators is that while many insects and animals may visit orchid flowers, each orchid species often has a “preferred” pollinator. Unfortunately, if pollinator populations continue to decline, many species of orchids could be at risk.

This is true too for many of our own food sources, including coffee, bananas, and a variety of tree nuts. These plants are truly dependent on their pollinators and in turn, so are we. According to pollinator.org, “worldwide, approximately 1,000 plants grown for food, beverages, fibers, spices, and medicines need to be pollinated by animals in order to produce the goods on which we depend. In the United States, pollination by honeybees and other insects produces $40 billion worth of products annually.” However, the loss of habitat, chemical misuse, invasive plant and animal species, and various diseases have severely affected pollinator species around the world. Unfortunately, the true scope of damage and the status of pollinators is still unknown, which is why it is so important to work to conserve pollinator species, even the seemingly non-desirable insects, such as flies.

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Bee on a Brown-eyed Susan (Rudbeckia triloba) in the Butterfly Habitat Garden

When we think of pollinators, we typically think of the glamorous ones: bees, butterflies, and hummingbirds. However, many plants are pollinated by other animals and insects such as bats, beetles, moths, and even flies; each one has its own distinct attraction to flowers. For example, bees, birds, and butterflies prefer brightly colored flowers, while flies and moths prefer pale or dark colored plants. A diverse selection of native plants in your garden can help to support pollinator populations in your area and maintain botanical biodiversity. Pollinator.org has handy regional guides on what plants are native to your area and attractive to the different pollinators in your eco-system.

So what can we do to protect and encourage pollinator communities? In the Butterfly Habitat Garden, Smithsonian Gardens has committed to planting pollinator-attracting plants free of chemical-based pesticides. In all of our gardens too, an Integrated Pest Management approach is used, meaning that we monitor insect behavior and can then attempt to control insect populations rather than eradicate them. This method can better allow for pollinators to do their jobs, as they are not exterminated by chemical-based pesticides.

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Smithsonian Gardens’ Butterfly Habitat Garden outside the National Museum of Natural History

Even if you cannot devote a whole habitat to pollinating critters, you can provide a refuge or food source with even one plant. James Gagliardi, horticulturist in the Butterfly Habitat Garden provided a list of some of his favorite plants in the garden that are frequently visited by pollinators:

Hummingbird Mint (Agastache spp)
Boneset (Eupatorium perfoliatum)
Bee Balm (Monarda spp)
Mountain Mint (Pycnanthemum muticum)
Salvia (Salvia spp)
Pincushion Flower (Scabiosa spp)
Goldenrod (Solidago spp)
Verbena (Verbena spp, especially Verbena bonariensis)
Lantana (Lantana camara)
Cardinal Flower (Lobelia cardinalis)
Great Blue Lobelia (Lobelia siphilitica)

-Elizabeth Chenevey, Smithsonian Gardens Education & Outreach Intern

June 17, 2014 at 8:31 am Leave a comment

Container Gardening Basics

Container gardening is fun for everyone and easier than most people think. Containers are easier to maintain in areas where space is limited, easy to move around depending on the light requirements, can be rotated depending on the season, and will break up the monotony of a deck, patio, or terrace.

It is entirely up to you, the gardener, whether to select the container before or after the plants are chosen.  Just make sure the plants and the container complement each other in size and color and remember that drainage in the container is a must!

Container gardens require a soil mix that is light and well drained.  Many potting mixes also have fertilizer added and contain ingredients to help retain moisture, both of which are helpful for container plants.  It is best to purchase soil labeled exclusively for container gardening.  These mixtures are usually made from ingredients that—oddly enough—don’t include soil, thereby making them “soilless” mixes.  If you find the bag too heavy to pick up it’s probably too heavy to use in a container.

Haupt Garden container garden

A variety of heights, colors, and textures in this Enid A. Haupt Garden urn make for an exciting container garden.

Plants with the same growing conditions and water and light requirements should be planted together.  Consider using non-flowering plants for unique leaf texture and color along with flowering plants, perennials, herbs, and even vegetables.  This type of planting is called “fusion” gardening in the green industry.   Perennials used in containers during the season can then be planted in the garden bed for the following year.

For a great looking display, a mixture of tall, medium-sized, and trailing plants is important.  Tall plants can be planted in the center, off to the side, or at the back of the pot.  Shorter plants can be placed around the tall plants and trailing plants close to the outside edges.

Smithsonian Castle hanging basket

Short on space? A hanging basket is the perfect solution if you’re lacking in square footage. This simple but colorful summer arrangement gussies up a lamppost next to the Smithsonian Castle. Eric Long, photographer.

The plants will only receive nutrition from you so using a well balanced fertilizer is important for overall plant health.  Top dressing with a slow release fertilizer helps get the plants off to a good start. The more water you add to the soil, the more fertilizer the plants will need.  An all-purpose food mixed with water is an easy and fast way to feed your plants.

A daily watering check is a must, especially if the container is displayed in full sun during the summer months.  Watering in the morning is best.  Plants will be able to quench their thirst through the warmer parts of the day and the risk of foliar diseases will decrease if the leaves are kept dry in the cooler temperatures at the end of the day.

Many varieties of plants need to be deadheaded to remove spent flowers and encourage more branching and new flowers.  Routine maintenance will also alert you to any diseases or pest problems that may occur in the container garden.

Inspire yourself to bring color and excitement to every area around your home through the wonderful world of container gardening.  Start out small and simple.  Gardening is a perfect way to achieve some quiet time and interact with nature.  Discover how fulfilling and fun container gardening really can be!

-Jill Gonzalez, Smithsonian Gardens Horticulturist

April 15, 2014 at 8:15 am 1 comment


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