Purple pansies in a large terra cotta container. (istock photo/ISTOCK PHOTO)
Containers are correctly watered when you see them drain. Leave a gap of an inch between the soil line and the container rim to ease and speed watering. Apply water in the morning so plants are fully hydrated by the afternoon, the hottest part of the day. Try to avoid wetting leaves.
— Adrian Higgins
Adrian Higgins has been writing about the intersection of gardening and life for more than 25 years, and joined the Post in 1994. He is the author of several books, including the "Washington Post Garden Book" and "Chanticleer, a Pleasure Garden."