Regional Gardening Reports :: National Gardening Association


May, 2009
Regional Report

Let Virginia Bluebells Go to Seed

Virginia bluebells' purple/pink and blue flower clusters are spring's early bursts of color. These ephemerals spread easily by self-seeding. Don't cut them as they yellow and die back naturally. The seeds will ripen. And more plants will emerge next spring -- some in unexpected spots if you're lucky.

Clean the Gutters

Despite some residual winter chill, mosquitoes are starting to buzz around the gardens. We tend to think of emptying water from pots, buckets, and saucers. Some mosquito types that spread West Nile virus breed in the wet leaves in roof gutters. Clean your house gutters and encourage neighbors to do the same.

Stop Larvae in Rainbarrels

There are several ways to stop wriggling mosquito larvae from infesting rainbarrel water. Some gardeners recommend keeping a layer of vegetable oil on top of the water. Others add the biological control Bt-israelensis (Bt-i), which is in mosquito dunks that last 30 days. One dunk treats 100 feet of water; it can be broken in half. Some rainbarrel plans include instructions to place a piece of wire mesh over open water.

Fluff Last Season%s Mulch

Your garden doesn%t always need new mulch. Two or three inches are enough to suppress weeds and retain moisture. If last season%s mulch is sufficient in your garden beds, fluff it up. By that I mean use a hoe or cultivator to break the mulch crust. Chop it and mix it, uprooting any small, sprouting weeds in the process. Fluffing will allow water to reach the soil and roots beneath the mulch layer.

Prune or Pinch Back Phlox and Asters

For broader, shorter plants, clip 2 or 3 inches off the tops of Phlox paniculata and Asters. Cut the stem just above the connection where leaf meets stem % the node. For a longer blooming stand of summer Phlox, clip the front half of cluster lower than stems in the rear. Be sure to prune off the dead Phlox flowers to encourage more successive flowering.


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