1. Q. I have some large, healthy hydrangeas that refuse to bloom other than perhaps one large bloom per year. Any ideas on what the trouble might be?

A. Hydrangeas require full sun and adequate moisture for best bloom. If you are meeting these needs, the only other obvious cause of lack of bloom is improperly timed pruning. Prune the plants immediately after bloom, so that new growth will be able to develop flower buds in the fall. Pruning in the spring or early summer removes the fall developed flower buds, preventing bloom for that year.

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