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Home / Lifestyle / Gardening / GARDEN CHECKLIST FOR JULY



The last days of June ended with an abundance of rainfall and surprisingly cooler temperatures.
July has arrived and that means that the year is about half over and the days are getting shorter. It also means that the warm temperatures of summer have set in for sure. Most of us put our gardens into a holding pattern in July. We just try to keep the bugs and weeds at bay and to keep cool. Here’s your gardening checklist for July.

TALLER LAWNS: Check the cutting height of your lawn mower. During the heat of Gulf Coast summers, consider raising the lawn mower blade to a higher setting. The higher the cutting height, the less lawn grass is stressed resulting in a healthier lawn.
SALVIAS: Re-blooming salvias, such as
Salvia greggii and S. farinacea, should be pruned back periodically during the summer. To make the job easier, use hedging shears, and remove only the spent flowers and a few inches of stem below.
PERENNIALS: Divide spring and early summer perennials including daylilies, iris, etc., and replant the best clumps. Discard the diseased or damaged material and share any surplus with friends.
PRUNE OLD CRAPE MYRTLE FLOWERS: Crape myrtles are putting on a spectacular flower display this year. After crape myrtles put on their first full bloom, you can stimulate the plants to extend their flowering period by pruning the flower heads as soon as possible after they finish flowering.
LOW SPOTS IN THE LAWN: Low areas in the lawn may be gradually filled with shallow applications of good top soil where needed. However, avoid temptation to apply a layer of sand over the entire lawn area just because your neighbor does. This is an excellent way to introduce new weeds, smother your grass and encourage unwanted insects and disease problems.
WEBWORMS AND BAGWORMS: “Do I have webworms or bagworms on my trees and shrubs?” This has been a frequently asked question over the last few weeks. Webworms are the ones that make the spider-like maze of webs around leaves near the tips of branches and bagworms are the ones that live inside brown bags that they drag along with them for protection.
Both insect pests can be controlled with organic insecticides such as Dipel, Bio-worm Killer or other organic spray products containing Bacillus thuringiensis. The caterpillars eat it, become sick almost immediately, stop feeding and then die within a few days.
Bagworms can be somewhat difficult to control, especially as caterpillars become larger. Conventional insecticides currently labeled for bagworm and webworm control include carbaryl, cyfluthrin, malathion and permethrin.
BARK LICE ON TREES: July is the month when many homeowners start reporting the appearance of strange webbing on the trunk and limbs of trees. Several concerned homeowners have already sent e-mails to me with digital photos of bark lice on tree trunks. The webs are produced by colonies of very small insects known as bark lice. The webs may give trunks and limbs the appearance of being “dressed” in a white stocking. Fortunately, bark lice (which really aren’t lice) don’t cause any harm to trees. In fact, they are very beneficial in that they eat lichens and fungi growing on the bark. No control is needed.
BLACKBERRIES: July is the last month for pruning blackberry canes which promotes secondary shoot growth. Blackberries should be lightly fertilized with a general purpose fertilizer such as 15-5-10 or 21-0-0.

Upcoming Seminar
WHAT: The Great Pepper Extravaganza
WHEN: Saturday, July 15, 2017
TIME: 9:00 a.m. – 12:00 Noon
SPEAKER: Gene Speller

TOPICS: Growing peppers in the home garden, recommended varieties for this area, insect and disease control, and pepper uses. A tasting display of salsa, pickled peppers, and pepper vinegar will be offered.  He will also have his homegrown peppers available for tasting and comparisons.

LOCATION: Galveston County AgriLife Extension Office located in Carbide Park (4102-B Main Street, La Marque). Pre-registration required (phone: 218-309-5065; e-mail will also have his homegrown peppers available for tasting and comparisons.

Dr. William M. Johnson is a horticulturist with the Galveston County Office of Texas A&M AgriLife Extension Service. Visit his Web site at

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