In the Garden: Clean Out the Pests with Insecticidal Soap

Organic Vegetable Garden (OVG), May 17th:

Flea beetles are going after our eggplant seedlings so we started applying insecticidal soaps in addition to using other methods of protection such as floating row covers and using arugula as a trap crop.  Insecticidal soaps kill insect pests while having few adverse effects on plants, animals, and the environment.  They are most effective on small, soft-bodied insects such as aphids, spider mites, thrips, whitefly, and mealybug.  To be effective, insects must come in contact with the soap before it dries so multiple applications may be necessary.  Soaps may be applied to edible plants and may be used the day of harvest.

Tips:

  • Read the label to ensure that the soap is effective on the pests you are trying to get rid of and will not harm the plants you are spraying.
  • Apply soaps in the morning or evening when drying time is the longest.
  • Avoid treating plants in direct sun.
  • Don’t treat tender or drought stressed plants as the soap may burn the leaves.

Learn more.

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Reminder: Sat., May 19th; Green Spring Garden Plant Sale

The Green Spring Garden Plant Sale is this Saturday, from 9am to 3pm. The volunteers in our demonstration gardens have been busy all spring dividing, rooting, and growing a large selection and variety of plants for this event. There will be more than 40 other vendors  at the sale, so you are sure to find something for your garden! Green Spring Garden is located at 4603 Green Spring Rd., Alexandria.

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Registration for Fall 2012 is Open

The registration for the Fall 2012 class of Master Gardener Training for Arlington / Alexandria is now open. We want to thank all who came out to Fairlington tonight to learn more about the program. Also, thanks to Kirsten Buhls, our Agriculture and Natural Resources Extension Agent, Kim Haun, our Master Gardener Coordinator, and Joe Kelly, our MGNV president. They provided an overview of the programs that are run through our VCE office, more details on the Master Gardener training program, and what it’s like once you’ve become a Master Gardener. This year’s training will be starting on Tuesday, September 11th and will run for 10 weeks, with classes every Tuesday and Thursday from 9am to noon. The application is available online. Please submit the application along with your check. Registration is currently open, but does fill, so if you know you are interested in taking the class, do go ahead and submit. More information about becoming a master gardener is available on this web page. If you have any questions, please call our Help Desk at 703-228-6414 or email mgarlalex@gmail.com.

2012 Master Gardener Training application (PDF)

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Native Vines Blooming in the Glencarlyn Library Community Garden

by Certified Master Gardener, Judy Funderburk

Ever since Arlington’s Invasive Plant Coordinator, Jenn Truong, asked us to take out the beautiful scented, evergreen, fall-blooming and often-called native and very invasive sweet autumn clematis vine (Clematis terniflora) on our back fence, we have been trying out new vines to cover the chain link and provide teaching tools for residents who want something other than invasive sweet autumn or Japanese honeysuckle to cover fences. [There is often confusion between sweet autumn, which is actually a Japanese import, and virgin's bower (Clematis virginiana), which is native. The leaves of these two vines are very different. Sweet autumn is usually five-leafed and not toothed; virgin's bower's leaf is broader, usually three-leafed, ovate and toothed.]

Gelsemium sempervirens (Carolina Jessamine) © Mary Free

Here are some of the native vines that are doing well in the Glencarlyn Library Community Garden and are beautiful, showy, scented, and some semi- or evergreen.

Carolina jessamine (Gelsemium sempervirens) was in full bloom from the end of March into mid-April this year, covering the archway entrance into the Library Garden with yellow fragrant flowers and evergreen foliage. Mary Free’s photo captured its twirling nature with her picture of the jessamine performing a delightful dance around our resident rooster (metal sculpture) on the back fence.

Lonicera x heckrottii ‘Gold Flame’ © Mary Free

At the same time, honeysuckle gold flame (Lonicera x heckrottii) was twirling and putting out its clove-scented magenta/orange blossoms on the light pole in the back garden. Some summers we have had problems with aphids and powdery mildew on this vine.

Lonicera sempervirens ‘John Clayton’ © Mary Free

Honeysuckle ‘John Clayton’ (Lonicera sempervirens), another native evergreen vine, was not to be outdone. At the end of March, it began blooming on the back fence and will continue throughout the summer, giving us slightly fragrant yellow tubular flowers plus, in late summer, red-orange fruits for a dash of additional color.

Bignonia capreolata (Crossvine)

Crossvine (Bignonia capreolata) sported her first flowers on April 17. This was exciting as they were the first blooms ever from a vine that was planted three years ago. Showy two-inch long trumpets that are reddish maroon on the outside with five yellow flaring lobes on the inside of each flower entice pollinators to enter.

The common name refers to the cross-shaped pattern revealed when the stem is cut.

American Wisteria (Wisteria frutescens) ‘Longwood Purple’ is a gorgeous alternative to the very aggressive Japanese and Chinese wisterias commonly grown in the U.S. Native to the southeastern states, ‘Longwood Purple’ has indescribably beautiful flower pods followed by dense clusters of lightly scented blue-purple blooms which last for several weeks.

Wisteria frutescens (American Wisteria)              Photo by J. Vic Funderburk

The Asian varieties are invasive with dense, hard-to-eradicate root systems that take over native plants in our parks and woodlands. Neighbors have spent many hours trying to eradicate the Japanese wisteria from Glencarlyn’s parklands.

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In the Garden: Strawberries are not for the Birds

Organic Vegetable Garden (OVG), May 12th:

For the past week we have been harvesting beautiful strawberries from our patch in the MGNV Organic Vegetable Garden in Potomac Overlook Park.  We noticed that many of the berries had been sampled by birds.  To prevent this, we have covered the berry patch with netting.  The netting can also keep squirrels and other critters away.

For more information on growing strawberries.

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Reminder: Sat, May 19th, Sun May 20th, Pruning Workshops

VCE Master Gardeners Offer Free Workshop on How to Prune Trees, Shrubs and Perennials

Pruning Example, courtesy of Virginia Tech

Join Master Gardeners, Tree Stewards, and VCE Extension Agent Kirsten Buhls at a workshop that provides hands-on experience in pruning small trees and shrubs and deadheading/cutting back perennials.  Bring your own pruning tools (hand pruners, lopping shears, pruning saws) if available.

Two workshops are offered on different dates and at different locations:  Saturday, May 19, 9:30 to 11:30 a.m., 5518 N. 18th St., Arlington and Sunday, May 20, 1:30 to 3:30 p.m., 2416 Ridge Road Drive, Alexandria.  Both locations are private residences and parking is available on the street. To register, call 703-228-6414 or visit www.mgnv.org.

More information is available in the following Virginia Tech publications:

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In the Garden: Companion Planting: Help your Plants Get by with a Little Help from their Friends

Organic Vegetable Garden (OVG), May 9th:

While setting up your friends can have varying results, choosing the right companions for your vegetable plants can help ensure successful outcomes. Companion planting is the practice of pairing certain plants to maximize beneficial relationships. Some plants repel pests, other attract pollinators, and some enrich the soil. In our garden, we paired eggplant with arugula. For the past few years, flea beetles have been devouring our eggplant seedlings. Since flea beetles prefer greens to eggplant, we are hoping that our few sacrificial arugula will attract them away from the eggplant. If you are committed to organic gardening, companion planting is an important strategy for helping your plants to thrive.

For more information.

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Reminder: Sun. May 6th, Glencarlyn Plant Sale

Library Gazebo
Photo credit: Mary Free

You’ve heard of “Local Food” — how about “Local Plants”?   Glencarlyn Branch Library Garden will be selling wonderful plants dug and potted by Master Gardeners from its own “plot” on Sunday, May 6, 10am -3pm — Rain or shine.   Also, Rhonda Stevenson of Country Gardens in Toms Brook, Virginia will be bringing hundreds of ferns, flowering shrubs, herbs, annuals, perennials, small trees, tropicals from her nursery.   Come early for best selection.  Check or cash please.   All proceeds go to support MGNV and the Library Garden.    Location:   300 S. Kensington Street, off Carlin Springs Road.   Come “Buy Local” and beautify your home and neighborhood.

Glencarlyn Plant Sale 2012 (PDF)

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In the Garden: Keeping Bugs at Bay

Organic Vegetable Garden (OVG), April 26th:

Protect Your Seedlings.

In the next couple weeks, most people will be planting seedlings. Protect the tender young plants from cutworms and slugs with collars made from newspaper.  Collars should be about 3 inches wide. Anchor the collars by digging a shallow trench (approximately 1 inch deep) around the seedling.  Place the collar around the plant and then fill the trench with soil.  Collars are especially important for plants like tomatoes, eggplant, and peppers because of their delicate stems—which can be quickly chewed clean through.

 

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In the Garden: Give your Seedlings Room to Grow

Organic Vegetable Garden (OVG), April 21st:

As heartbreaking as it can be, you just got to yank out some of those cute little seedlings when they start sprouting in a nice green row. Thinning, just like weeding, reduces competition between plants and will give your veggies room to grow. It will also prevent the plants from becoming spindly because they are too cramped. While any plant that is direct seeded can benefit from thinning to the recommended spacing, leaf lettuce, beets, radishes, carrots, spinach, and other greens will really appreciate the space. Thin your seedlings when plants have one or two pairs of true leaves—the plants should be about three inches tall. Try to thin when the soil is damp (or water before starting). Thin in the afternoon or early evening so that the plants can recover during the night.

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