How to do put mulch on a garden to keep moisture in the garden bed?
Wait until plants are well-developed before placing garden bed mulch around them. (Most gardeners don’t apply garden bed mulch until later in June or July.) Put mulch around plants that need it, like tomatoes. Leave a clear boundary around the plant and don’t let the mulch touch the plant at all. The goal is to keep the moisture in the soil so give the plant space.