David Meade wrote:
There are many different kinds of hydrangeas that have white flowers - do you
happen to know what type yours is? Most hydrangeas will prefer at least some
shade, a rich, well draining acidic soil and regular water. Fertilizing in spring
with a product formulated for acid loving plants will help. Pruning is a tricky
issue - without knowing what type you have, it is difficult to recommend a pruning
technique, as they differ greatly depending on type of hydrangea. Whatever type
you have, now would not be the best time for any pruning. Usually that is best
accomplished in early spring.
pam - gardengal