Look for areas on the extreme ends of the gradient. It is these areas that greatly restrict plant choices. Flooded - Areas where standing water is present most of the growing season. Wet - Areas where standing water is present most of the growing season, except during times of drought. Wet areas are found at the edges of ponds, rivers, streams, ditches, and low spots.
Wet conditions exist on poorly drained soils, often with a high clay content.
Moist - Areas where the soil is damp. Occasionally, the soil is saturated and drains slowly. These areas usually are at slightly higher elevations than wet sites. Moist conditions may exist in sheltered areas protected from sun and wind. Moisture is available to plants most of the growing season.