Excess water displaces oxygen In the soil and smothers plant roots. Symptoms of root damage include: wilting leaves or shoots; marginal and interveinal browning of leaves (‘looking scorched’); poor color and stunted growth. Wet areas may be produced by swales, drain spout runoff and low areas, even when soil drainage is adequate in most of the site.
The following perennials tolerate wet sites better than most. Few plants tolerate standing in water for long periods, so try to correct the drainage where possible, or minimize the length and amount of standing water.