Water very sandy soil more frequently with less water. Plant petunias, marigolds, zinnias, asters, nasturtiums, salvia, coleus and impatiens outdoors. Watch for notches eaten out of leaf edges of peonies, azaleas, bergenia, lilacs, rhododendrons, and other shrubs. That is the root weevil at work. The adult weevil crawls up the plant from the ground at night, so you will not be able to see them during the day.
Orthene spray is the best control.
Watch for a build-up of mites on geraniums, fuchsias, and other susceptible plants as the weather warms up. Protect these plants with frequent water sprays. A month after iris blossoms have died back, cut leaves down to a few inches above ground level. Divide and replant them after flower heads are removed. Do not bury the rhizome.