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Question of the week

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Q.  Help! What are all these caterpillars hanging from my oak trees and what should I do about them?

A.  Don’t worry. They are oak leaf rollers in their seasonal explosion. Despite their alarming descent on the garden, they’ll eat a few leaves and be on their way. They don’t cause significant damage. You can apply bacillus thuringiensis (BT) if you like, but it isn’t necessary to protect your trees.

More information about oak leaf rollers is available here.

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Plant of the week

Photo: PlumbagoPlumbago

When the weather heats up from late spring through early fall most of our landscape color options are in the yellow to red color range. Cool blue shades are hard to come by. Plumbago is a heat tolerant perennial that blooms all summer, producing mini bouquets of flowers in a beautiful shade of sky blue. Give it a moderate amount of moisture and some protection from the late day sun for best results. A white blooming form is also available.

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Planting tips of the week
  • Now that you’ve paid your taxes, it’s okay to fertilize. Remember—you don’t want to fertilize until the grass is actively growing. Otherwise, you’re wasting your money. The active growth will take up the nutrients most quickly. Also, weeds are on the decline so they won’t steal the nutrients themselves.
  • You want to use a ratio like 4-1-2, higher in nitrogen than phosphorous, but at a moderate level. Too much nitrogen can lead to disease. And even though some gardeners traditionally wait until a rain to fertilize, the result will simply be washing the product away from your plants into the creeks.
  • Sign up now for the fall Master Gardener Class -- Call (512) 854-9600, Monday through Friday, 9 a.m. to 4 p.m.

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