Giveaway for October issue of Pegplant’s Post: Wild Valley Farms Wool Pellets

Enter your e-mail here to subscribe to Pegplant’s Post, a free monthly newsletter about gardening in the Washington DC metropolitan area. Each issue lists 50 to 100 local gardening events, lectures, and workshops; recently published gardening books; and articles and tips specific to this immediate area. Each issue also features a giveaway and for the upcoming October 2019 issue we have collaborated with Wild Valley Farms to give away two 8 oz. bags of wool pellets. The wool pellets are compressed from all natural, 100% organic wool sheared from sheep at Wild Valley Farms in Salt Lake City, UT, and nearby ranchers. When the wool pellets are added to the soil, especially in containers and hanging baskets, the fibers naturally retain moisture and reduce the amount of time you have to water your containers. The expansion of wool pellets in the soil creates porosity, which aids in plant development. The wool also provides a natural source of nutrients: 9% nitrogen, 1% phosphorus, and 2% potassium. Only subscribers can enter the giveaway so sign up now for a chance to win two 8 oz. bags. Each is enough for 6 one-gallon pots or hanging baskets.

I met Albert Wilde, the owner, when I was in Salt Lake City a month ago. He explained that the idea came when his wife wanted to be able to spend less time watering her containers. As a sheep farmer, he looked around for what he could use on hand and added the waste wool (from shearing the sheep) to her containers’ soil. It worked but he began to notice that the plants actually grew better. He worked with local laboratories and discovered that the wool also delivers nutrients to the plants and increases porosity (like perlite). The plants can access the nutrients 30 days faster than other organic fertilizers. Wild Valley Farms also sells other products on their website, everything is made in the U.S.

Companies for Ordering Fall-Planted, Spring-Blooming Bulbs

School is back in session, which means it is time to order the fall-planted, spring-blooming bulbs such as daffodils, hyacinths, and tulips. In addition to your local nurseries, check out this list of bulb companies. For other companies that primarily sell seeds and may also sell bulbs, see the “seed catalog” tab on pegplant.com.

Amaryllis and Caladium Bulb Company, Florida, has catalog and can order online. Sells amaryllis, caladiums, and spring and summer bulbs.

Brecks, Ohio, has a catalog and can order online, states that it ships bulbs directly from Holland

Brent and Becky’s Bulbs, Virginia, has a catalog, can order online, can visit display garden and shop in Gloucester, VA.

David Burdick Daffodils and More, Massachusetts, has catalog and website but not able to order online. Has daffodils, trollius, colchicums, and a few other bulbs

Dutch Gardens, Illinois, has catalog and can order online, sells bulbs and perennials

Dutch Grown, Pennsylvania, order bulbs online.

Easy to Grow Bulbs, California, can order online, no catalog. Sells bulbs, succulents, and houseplants.

John Scheepers Beauty from Bulbs, Connecticut, can order online and has catalog. Also has sister company Van Engelen for wholesale bulb orders and a sister company, Kitchen Garden Seeds, for vegetable, herb, flower seeds

Longfield Gardens, New Jersey, can order online but no catalog, sells bulbs and perennials

McClure and Zimmerman, Wisconsin, has a digital catalog and can order online, sells bulbs

Odyssey Bulbs, Massachusetts, online, no catalog, sells unusual bulbs and perennials

Old House Gardens, Michigan, can order online and has a print catalog, known for heirloom bulbs

RoozenGaarde and Washington Bulb Company, Washington, has a mailorder and internet division called Tulips.com. There is a retail gift shop in WA. Also ships flowers and promotes bulbs as wedding favors.

Telos Rare Bulbs, California, sells bulbs from South Africa, South America, and wester U.S., online, no catalog

White Flower Farm, Connecticut, can order online and obtain catalog, wide range of bulbs, perennials, holiday plants, and gardening tools. Has display gardens and store in CT.

American Heritage: Native Paw Paw Trees

Paw paw flowers in the spring

It’s paw paw season! Paw paws (Asimina triloba) are native trees that bear fruit in August, September, and October. Fruit of cultivated trees look very similar to mangos—green, kidney-shaped, and about 6 inches long and 3 inches wide. They have a variety of common names such as Indiana banana, poor man’s banana, and bandango. When cut in half, the interior reveals a yellow, custard-like pulp with two rows of large seeds. Paw paws can weigh from ½ to 1 pound. Technically a berry, they are the largest North American edible fruit. Paw paws taste like a cross between a banana and a mango with a splash of pineapple. They can be eaten raw or used in ice cream, pudding, smoothies, butter (such as apple butter), baked goods like cookies and pies, and even beer, brandy, and wine!

From Florida to Texas, north to New York, and west to Michigan, Illinois, Iowa, and Nebraska, paw paws are native to 26 states and grow as understory trees in hardwood forests near streams and rivers. In the wild, the trees grow to 15 to 30 feet and sucker, creating colonies. Reminiscent of cucumber magnolias, they have foot-long, dark green leaves. Unlike other fruit trees, paw paw trees are not subject to a high level of pests and diseases.

Paw Paws in American History and Folklore

Paw paw trees are part of American history and folklore. Jamestown colonists wrote about them in the 1600s. John Lawson, an Englishman, described them in his travels in the Carolinas in the 1700s. Danielle Boone enjoyed eating them. Members of the Lewis and Clark expedition ate paw paws for pleasure as well as sustenance. George Washington grew paw paw trees at Mount Vernon and ate the fruit as dessert. Thomas Jefferson grew them and sent seeds to his colleagues in Europe.  William Bartram, a naturalist, described the trees in Bartram’s Travels. His father, John Bartram, a botanist, sent seeds to Europe. During the Civil War, soldiers as well as African American slaves collected the fruit in the wild to supplement their meager diets. There is even a popular folk song called “Way Down Yonder in the Paw Paw Patch” about collecting ripe paws paws from the ground and putting them in a basket.

Paw paw fruit develop in clusters

Finding Paw Paw Trees and Fruit

Currently, Washington DC residents can see paw paw trees in the wild along the C&O Canal and Potomac River and as native plant representatives in public gardens. There are paw paw trees at the Smithsonian Pollinator Garden, next to the National Museum of Natural History, and at the U.S. Botanic Garden’s newly renovated Bartholdi Park and their National Garden’s Regional Garden of Mid-Atlantic Native Plants. 

Although paw paws are part of American heritage, you may not find them in grocery stores. When the fruit is ripe enough to eat, it drops to the ground and is highly perishable. The thin skin bruises easily, discoloring to black. Paw paws are best eaten immediately or preserved by removing and freezing the pulp. You may find them at local farmers markets in peak season and you will definitely find them at paw paw events across the country in the fall.

Growing Paw Paws in the Home Landscape

Paw paw fruits can be eaten raw

“There is a paw paw renaissance now,” said Michael Judd, owner of Ecologia, an edible and ecological landscaping service in Frederick, MD. Author of Edible Landscape with a Permaculture Twist and For the Love of Paw Paws, Michael hosts an annual paw paw festival which will be on September 21 this year at LongCreek Homestead. “I call the paw paw an edible landscape all-stars because the tree is very attractive, low maintenance, and very fruitful.”

As native, hardy trees, paw paws can be grown in typical suburban plots. “Paw paws grow easily here,” said Michael. “This is paw paw country.” Although they are not self-fertile, that is, there must be two trees to cross pollinate to produce fruit, one can trim the trees to fit in residential properties. Michael recommends growing the trees in full sun, 10 to 12 feet apart, and cutting the central leader back to keep the trees at 8 feet. This shorten stature also makes them easier to harvest the fruit. Therefore, homeowners could have two 8-foot trees in the yard producing 50 pounds of fruit each year. If full sun is not possible, they can grow in part shade but will produce less fruit.

Paw paw trees have a pyramidal shape

Michael recommends purchasing either a grafted tree, a select seedling, or a specific cultivar. Starting from seed takes years to produce fruit. Also starting from a wild paw paw seed will result in less than desirable fruit. The taste of wild paw paws varies plus the fruit is small with a poor pulp to seed ratio.  Breeders spend years selecting desirable characteristics such as large fruit, a high pulp to seed ratio (more pulp, less seed), and good flavor.

You can’t go wrong planting paw paws. They are native, deer resistant trees that provide fruit and pretty yellow fall color. “Paw paw trees are very ornamental, they have a beautiful pyramidal shape,” explained Michael. “The leaves turn to a beautiful yellow golden color in the fall and when the leaves drop they reveal a tree with nice architecture in the winter.”

All photos taken by Michael Judd.

Start Planting Cool Season, Hardy Annuals for Spring Flowers

snapdragons in the spring

Now is the time to start thinking of planting cool season hardy annuals. This is a group of annuals (grow and die in one season) that can survive the winter and thrive in cool spring weather. In the Washington DC metro area, they are planted in the fall and bloom in the spring. They spend the winter getting established so when spring arrives, they are ready to bolt out the door waving their pretty flowers before the warm season summer annuals appear.

Examples of cool season annuals are snapdragons (Antirrhinum majus), calendula (Calendula officinalis), bells of Ireland (Moluccella laevis), delphinium (Delphinium), lisianthus (Eustoma), love in a mist (Nigella), sweet peas (Lathyrus odoratus), sweet William (Dianthus barbatus), and bachelor buttons (Centaurea cyanus). Many of these make great cut flowers.

I credit everything I have learned about cool season hardy annuals to Lisa Mason Ziegler and her book, Cool Flowers: How to Grow and Enjoy Long-Blooming Hardy Annual Flowers Using Cool Weather Techniques.  Lisa manages a commercial cut flower business in Newport News, which is in Zone 7, similar to my Northern Virginia garden. In addition to growing and selling cut flowers, she writes books, gives lectures, provides free videos as well as Facebook Live presentations, and manages a website called The Gardener’s Workshop.

Several years ago I was inspired by her book to plant calendula and snapdragons in the fall. I was starting them in the beginning of the growing season and was not having great success. The weather became too hot before the snapdragons could bloom and the calendula foliage was covered in powdery mildew because of the summer’s heat and humidity. When I tried her method of starting them in the fall, they both bloomed early enough the following spring that I was able to enjoy the calendula flowers before powdery mildew set in and cut many snapdragons for indoor arrangements.

calendula flowers in the spring

This year, I plan to grow sweet peas, which I have not been able to master in the spring. Our springs are just too short to have a long blooming period. I bought a package of Botanical Interests ‘Old Spice Blend’, a fragrant, heirloom blend of various flower colors. Interestingly, sweet peas are deer resistant and attract pollinators but I am going to grow them for indoor flower arrangements so I can enjoy their beautiful, fragrant flowers in the office.

Although Lisa provides specific information for 30 flowers in her book, in general, we should start 6 to 8 weeks before the average first frost. In Northern Virginia, 8 weeks is August 31 and 6 weeks is September 15. She recommends to err on starting later rather than earlier. Some seeds can be sowed directly in the garden while others work well as transplants. Sweet peas can be done either way so I am going to do both as an experiment to see which works better in my garden. I will start half of the seeds indoors under lights and half outdoors, directly in the garden. In order to have transplants large enough to move into the ground around September 15, I would have to start sowing seeds around September 1. Then I can sow the remaining seeds around September 15. September is still a very hot month so I will have to remember to water often. If this works, next year I will post a photo of the sweet peas.

If hardy annuals are something you would like to try, you can catch up by visiting Lisa’s website, listening to her videos, and reading her book. Although she sells seeds and gardening products, you can also purchase seed packets at your local independent garden center. Good luck!

Time to Cut Those Bagworms!

Last night, during my evening walk I noticed an unusual number of bagworms on a few evergreens. Bagworms are common pests in the Washington DC metro area. What I saw weren’t the bagworms themselves (Thyridoptery x ephemeraeformis) but their “homes,” 2-inch long “bags” they have created from their spun silk and plant debris. These bags were hung like small, brown ornaments on relatively new plantings in someone’s front yard. Some of the needles were clearly brown and dead.  Interestingly, one bag was hanging from the neighbor’s chain link fence, creating a very visible view of the threads wrapped round the metal.

Bagworms are moths, native to North America. They can attack more than 120 different types of trees but we tend to see them on evergreens such as juniper, arborvitae, cedar, spruce, pine, and Leyland cypress.

In the beginning of the summer, the eggs hatch and the larvae move out of the bags. The tiny caterpillars, 2 millimeters long, eat foliage and/or move to other trees via their silk threads. When they settle on their host tree, they spin a small bag of silk and plant debris. As they grow, their bags become bigger with more material collected from the host plant. By August, they have matured and the bags are very visible. During August and September the male adult bagworms, i.e., moths, emerge and fly to find a female to mate. The females cannot fly, they are grub-like and never leave the bag. Mating occurs through the bag and after mating, the female lays 500 to 1,000 eggs within her pupal cast skin and dies. The eggs overwinter and hatch next year in May or June.

Bagworms can defoliate and kill trees, especially evergreens. Although they can attack deciduous trees, most are not defoliated enough to be killed. Bagworms can also kill twigs by winding their silk around the twigs too tightly.

note white silk thread wrapped tightly around chain link fence

Now is the time to look for the bags and remove them by cutting them off–not pulling–bagging and disposing. Do not put them in your compost bin. If they are on the perimeter they will be easy to find but don’t forget to move branches aside and look within the tree. It goes without saying that a tree that has a bag will be damaged repeatedly each year, weakening the tree and possibly killing it.

Another option is to spray the tree with Bacillus thuringiensis (Bt) in May or June when the caterpillars have hatched and are on the foliage. This is a type of bacteria that kills the worms but does not harm the tree. If the tree is too tall, call an arborist. Spraying them later in the season after they have created their bags will not work since the bags will protect them. Or replace the evergreens with more resistant plants. But go out there now and inspect your plants, you need to remove them before the males emerge!

Habanada: A New Habanero Without the Heat

As a professional garden communicator I receive plants from nurseries to trial in my Virginia garden. I grow them to see how well they perform in our hot and humid summers, our mild winters, and with our own particular population of insects and diseases. Frequently I am growing plants that I would not have even looked at in a garden center. This year I grew something new to me and a game changer for gardeners as well as chefs: Habanada.

Burpee sent me a Roulette “sweet habanero” pepper plant. I have heard of habanero chilies but I have not grown them before because I cannot tolerate the heat of chili peppers. I always grow sweet pepper plants. This habanada plant has not only grown well, it has been producing many peppers about three inches long. Each pepper has folds and dimples, a broad shoulder, and a tapered end. Now in the beginning of August, the plant has about 10 peppers. I ate one raw and it was not spicy at all. It was not sweet either, certainly not as sweet as yellow and red snacking peppers. Intrigued, I had to learn more.

A search on the Internet told me that several years ago, the University of New Mexico discovered a plant from its habanero line that did not register on the Scoville scale. The Scoville scale measures the level of capsaicinoids, the chemicals that cause the burning sensation or the heat. A normal habanero can reach 300,000 Scoville heat units (very high). They sent seeds to Cornell University plant breeder Michael Mazourek who was interested in peppers at the time. Mazourk was inspired to breed a delicious pepper without the heat as part of his doctoral research. The result was the habanada.

I read that the habanada has “floral properties,” that it tastes like a melon or a guava, but to me it is savory, similar to a soft cheese. I picked them at a more orange than red stage but I will let some mature to red and see how they taste again. With the ones I did pick, I chopped them and made an omelet that was delicious. No doubt chefs will be able to see the possibilities of using habanadas in desserts, as a spread, or maybe even a jelly. It can be used whenever a sweet or hot pepper is called for in an entrée and it certainly can be used to color a dish.

The plant was easy to grow. It is about 3 feet tall now. I used a single stake because a single stake has always sufficed with my other peppers but this plant is bushier so I had to keep it propped up with yarn. Next time, I will use a tomato cage. Oh yes, there will be a next time, I am growing this again next year. My habanada plant grows with my other peppers and tomatoes and they all receive ample sun and water but habanadas do not need as much fertilizer as tomatoes.

I highly recommend the habanada, not only as a star performer in the garden but as a tasty pepper!

Three Heat-Tolerant, Pollinator-Attracting, Deer-Resistant Perennials

We are having a hot, dry streak now which really separates the weak from the strong in the garden. Now is a good time to see which plant is tolerating this weather well in other people’s garden so you can copy for your own garden.

On one particularly hot day this past weekend I was downtown visiting the Smithsonian museums. I spent a lot time in the Pollinator Garden, next to the National Museum of Natural History. This is a 400 x 40 feet area on the east side of the museum at 9th Street between Constitution Avenue and the Mall. The Pollinator Garden is managed by Smithsonian Gardens staff and is a wonderful place to relax and watch the butterflies.

I noticed several plants that were tolerating the heat well, that is, they were in full sun and not covered in powdery mildew.  As expected, they were definitely attracting bees and butterflies. These seemed worthy of copying in my garden. When I got home I looked them up and learned that they are rabbit and deer resistant as well as being full sun, drought-tolerant perennials. This is not to say there weren’t other worthy notables in the Pollinator Garden but these are definitely plants to add to my collection next year!

Wild Petunia

Although this plant is called wild petunia (Ruellia numilis), it is not related to petunias. These plants have lavender blue flowers that bloom from summer to fall. They are low growing with a trailing habit, reaching about a foot tall. They can serve as a groundcover and be used as a spiller in a container.

Allium ‘Millenium’

‘Millenium’ is a member of the onion family (Allium) grown for its ornamental, purple globe flowers. The plants grow to 1 to 1 ½ feet tall, providing a strong vertical interest.  They are great in the garden and can be used in containers as thrillers. After the flowers fade and die, the globe structure becomes tan and remains for a while, which also provides interest.

Walker’s Low catmint (Nepeta) is a member of the mint family, so it has gray green aromatic foliage. In the summer, the plant has small, lavender blue flowers, but each stalk has so many that sometimes the plant seems covered in a purple haze. The plants are low growing, about a 1 to 2 feet tall, and used as a groundcover or small shrub.

Walker’s Low Catmint

Getting Ready for College: Don’t Forget to Bring Your Houseplants

Small Arrowhead Plant

As my kids get ready for college, I think (as all gardeners do) of suitable houseplants for their dorms. My twins will be at different colleges and from orientation tours I know the light level in these rooms will be very low. Quite possibility the plants may not get watered but I think their green will be appreciated and viewed as “decoration.” Unbeknownst to my kids, the plants will be functional. They will improve air quality by removing chemicals and carbon dioxide and supplying oxygen. Plus, they will provide a positive psychological impact by increasing memory retention and concentration and reducing stress. Quite possibility the presence of plants will remind my kids to text their parents every now and then but this remains to be seen.

I knew I would not be able to drag them to a nursery so I showed them photos of five low light, low maintenance plants. I explained that I picked these five because of the variety in shape and color and they don’t have to worry about watering often, it won’t interfere with their studies. For all of these plants, the soil should be kept barely moist and fertilized only once a year.

ZZ Plant

ZZ plant (Zamioculcas zamiifolia)

The ZZ plant is native to eastern Africa. The unusual botanical name comes from the cycad genus Zamia because the foliage is similar to cycads and culcas, the Arabic name for elephant’s ear plant (Colocasia). I thought this fact alone would endear them to my 18-year-olds. But they liked the ZZ plant’s distinctive glossy, dark green foliage. The pinnate leaves are about a foot long with 6-8 pairs of leaflets, about 3 to 6 inches long, spaced in such a manner that they look like a ladder.

The plant can grow to a few feet tall so it is not a desktop plant. The roots are actually swollen rhizomes, which means the plant can tolerate very dry conditions. Although ZZ plants are not grown for flowers, they do bloom at the base of the plant with peace lily type flowers. I doubt this will happen in a dorm.

Chinese Evergreen

Chinese evergreen (Aglaonema spp.)

Chinese evergreen plants vary in color and size. Although it is an upright plant that grows to a foot or two, it is possible to purchase a young small one for the desk. There are plants with variegated green and cream leaves or green and silver leaves, and there is a new variety called red aglaonema with red, pink, and green leaves.

Arrowhead plant (Syngonium spp.)

Like the name suggests, arrowhead plants have arrow-shaped leaves. They are often sold as small plants for terrariums, which make them suitable for desks. There are also full grown plants about a foot tall. The leaves usually are white and green but there are gold and green varieties and plants with a blush of pink.  As the plant matures, the leaf shape and color changes so that mature leaves can be all green.

Arrowhead with Pink Blush

Snake Plant

Snake plant (Sansevieria spp.)

Snake plant is very popular with its foot long, sword-shaped leaves. Leaves are usually a mottled green, with yellow, gray or silver margins. There are varieties with more yellow or silver coloring in the leaves. For a new take on snake plant, look for Bantel’s Sensation, which has narrower leaves with white vertical strips or the cylinder snake plant with very narrow, cylindrical leaves. There are some very short, almost stunted versions, that are suitable for desks. Usually they will be tall enough to grow in a container on the floor or on a stand.

Devil’s ivy or golden pothos (Scindapsus spp.)

Devil’s ivy or golden pothos has heart-shaped leaves with green and yellow or green and white variegation. There are golden varieties as well. In the tropics, this is a vine so it has a trailing or cascading effect when grown indoors. It is available in small containers and can be grown on a desk. The stems also can be allowed to cascade down by placing containers on top of shelves or closets. Cuttings of the stems root very easily, which makes a great plant to share with friends or grow in a vase of water.

White and Green Variegated Pothos

My daughter and son chose the ZZ plant as their top choice for its distinctive foliage. My daughter’s second choice was the Chinese evergreen and my son’s second choice was the snake plant. Try showing this article to your kids to see what they would prefer and surprise them with their choice when you visit in the fall during parents’ weekend!

Golden Pothos

Subscribe to Pegplant’s Post and Be Eligible To Win Six Peonies!

Cheddar Supreme

Enter your e-mail here to subscribe to Pegplant’s Post, a free monthly newsletter about gardening in the Washington DC metropolitan area. Each issue lists 50 to 100 local gardening events, lectures, and workshops in MD, DC, and VA; recently published gardening books; and articles and tips specific to gardeners in this immediate area. Each issue also features a giveaway product or plant that one lucky subscriber can win. Look for your issue in your inbox during the last weekend of the month.

Bowl of Cream

For the giveaway in the upcoming August issue we have collaborated with Peony’s Envy to offer the White Peony Pack. This consists of two Henry Sass herbaceous peonies (the purest white bloom), two Bowl of Creams (very popular), and two Cheddar Supremes (a Klehm original with a hint of yellow). This is a total of six plants valued at $164!  Not only are the flowers fragrant, the plants are deer-resistant too! Only one subscriber will be able to win all six, which will be shipped directly from Peony’s Envy, bare root, in the fall.

Henry Sass

Peony’s Envy has the most extensive collection of tree, herbaceous, and intersectional peonies in the northeast. In addition, they have a display garden open to the public on a 7-acre, New Jersey property and a peony cutting garden. Check out their beautiful website — they sell all things related to peonies such as kitchen towels, jewelry, neckties, aprons, and notecards. Thank you Peony’s Envy for collaborating on such a generous and beautiful giveaway!

Photos courtesy of Peony’s Envy.

Visiting Local Demonstration Gardens for Ideas and Help

As the summer peaks, I like to visit the local demonstration gardens to see how well the plants and vegetables performed in this area. Demonstration gardens are a great way to learn what works in the Washington DC metro area and how to manage our local issues, such as deer and rabbits. Each county that has a Master Gardener program usually has at least one demonstration garden, managed by the volunteer Master Gardeners. To find such a garden, call your local county Master Gardener program representative (your local extension agent). Some have several to showcase various environmental conditions and some use the garden as a place to teach or host workshops.

The Master Gardeners of Northern Virginia (Arlington and Alexandria) have seven demonstration gardens:

  • Glencarlyn Library Community Gardens, corner of S. Third and S. Kensington Streets, off Carlin Springs Road, Arlington
  • Teaching Garden at Fairlington Community Center
  • Master Gardener Tribute Bench and Garden at Fairlington Community Center
  • Organic Vegetable Garden, Potomac Overlook Regional Park, Marcy Road, Arlington
  • Rock Quarry Shade Garden, Bon Air Park on Wilson Boulevard and N. Lexington Street, Arlington
  • Simpson Park Gardens, E. Monroe Avenue at the end of Leslie Avenue, next to the YMCA in Alexandria
  • Sunny Garden, Bon Air Park, Arlington

The Prince William County Master Gardeners manage a very large “Teaching Garden” at St. Benedict Monastery, 9535 Linton Hall Road, Bristow, VA. Within this large garden are mini gardens to illustrate certain conditions or issues, such as a deer resistant garden, shade garden, vegetable garden, and pollinator garden.

The Loudoun County Master Gardeners uses Ida Lee Park on Ida Lee Park Drive, Leesburg, as a teaching garden.

The Montgomery County Master Gardeners have a demonstration garden at the Agriculture History Farm Park, 18410 Muncaster Road, Derwood, MD, and they manage the herb garden at the National Library of Medicine Herb Garden at the National Institutes of Health campus in Bethesda. Each year, for a temporary period they manage award winning gardens near the Old MacDonald Barn at the Montgomery County Agricultural Fair.

The Prince Georges County Master Gardeners have demonstration gardens at their headquarters at 6707 Groveton Drive, Clinton, MD.

The Urban Demonstration Garden, part of the Capital Area Food Bank at the DC warehouse, 4900 Puerto Rico Avenue NE Washington DC.

The Washington Youth Garden, a program of the Friends of the National Arboretum with support from the U.S. National Arboretum (on Arboretum grounds) in Washington DC.

In addition some plant societies such as the National Capital Dahlia Society have demonstration gardens specific to their plant of interest. Contact the society directly to see if they have one. The National Capital Dahlia Society has the Nordahl Exhibition Garden for displaying dahlias at the Agricultural History Park in Derwood, MD. The Plant NoVA Natives has a list of demonstration gardens that have native plants on their website.