Watch for pests in outdoor containers. Weeds may develop from seeds blown into the pot, and insects need to be controlled using appropriate measures. Be on the lookout for chewing insects, such as caterpillars and loopers, since they can do a great deal of damage in a short time. Spider mites, another offensive pest of many plants, can be partially controlled by frequent spraying of water from the garden hose. USDA entomologists are testing the biological control potential of an insect that preys on the azalea's worst enemy, the lace bug.
Lace bugs suck nutrients from azaleas and other plants producing unsightly white spots on leaves.
An adult of the insect predator, Stethoconus japonicus, can consume two to six lace bugs per day. Transplants become less stressed when they are set out on a cloudy, calm day. Unfortunately, gardeners may need to transplant when they have the time, regardless of the weather. Strong sun and wind are hard on new transplants, so set out plants in the late afternoon when the wind comes down and the plants have overnight to acclimate. Provide shade and wind protection with berry baskets, small crates, or screens.