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What to do…. August
Fertilize: Give outdoor plants- roses, trees, flower beds-final fertilizing by the end of the month. Slow-acting fertilizers like amm-onium sulfate, ammonium phosphate, fish emulsion, bone or blood meal, well-composted manure, and compost will break down during the following weeks and you should see healthy new growth in three to four weeks. This last feeding will help prepare your plant for the winter months ahead. If you wait too long to fertilize-mid-September or October- the new growth will be appearing in early November, much too close to the first frost date. New growth is always more susceptible to frost damage. Follow fertilizer directions carefully. Problems to watch for: Sunburn - large white spots developing on tops of leaves, usually in the center which then turn brown. Saltburn - burning starts at edges of leaves and moves inward, on narrow leaves it starts at tips and works down. Overwatering - roots begin to rot, plant is wilted even if you give it additional water, soil around plant never dries, internal leaves yellow and drop. Texas root rot - attacks quickly, initially resembles sunburn, watch for white sporemat beneath tree, plant dies but leaves remain on plant, positive diagnosis requires examining roots under microscope. Cicadas - dead branch ends with brown leaves, look for chewing marks on the branches. Chewing insects - random holes or skeletonized leaves indicates beetles, whole leaf being consumed except veins indicates caterpillars, tunneling between leaf surfaces indicates leaf miner. Sucking insects - small white or yellow spots indicates presence of aphids, spider mites, plantbugs, leafhoppers, etc. The most positive identification you can make is to find the offending bug on the damaged plant. When you see damage, look for the source before resorting to a wide-spectrum pesticide. By targeting a specific pest, you may be able to avoid killing the "good guys"-ladybird beetles, praying mantis, lacewings- along with the bad. Prolong annuals: Pinching off spent blossoms will encourage plants to continue flowering. You can cut back your spring planted tomatoes to encourage them to produce a fall crop. Cut them back to about one-third their current height. Remember to give them some fertilizer to fuel this new growth. Plant cool-season veggies: Plant cabbage, carrots, chard, kale, lettuce, potatoes, spinach, and turnips. Plant cool-season flower seeds: Sow calendulas, carnations, pansies, Iceland poppies, snapdragons, and violas for fall color. Stay one step ahead of your weeds: When admiring your garden each morning keep pulling up those tiny weeds that pop up overnight.
"Give weeds an inch and they'll take a yard"
Jackie Dillon-Fast Former Cochise County Master Gardener (Reprinted from the Cochise County Master Gardener Newsletter, August, 1990.)
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