DEAR GARDEN COACH: I was recently on a garden tour and saw a beautiful plant that was a mallow, I think. I was wondering if you could give me some information about whether these are a good choice of ...

Q:Our tree mallow, which we have had for years, is being damaged by something we haven't seen before. From a distance, it looks like rust, but up close it appears to be a psyllid insect or a mite. We ...

M.B.: Yes, most of the masses like ashes, but those that thrive in our naturally acid soil -- such as rhododendrons, azaleas and camellias -- object to wood ashes or lime that could make the soil too ...