We planted eight forsythias along the edge of our back yard. They got over the shock and were doing well for two months. My wife heard somewhere that coffee grounds were good for forsythia, so we went to Starbucks and got a bag. A week after we put the grounds around the root balls, the forsythia are suffering.
I don't know if it's the acidic nature of the coffee grounds or the extreme amount of rain that we've gotten, but the forsythia are looking pretty pathetic.