I apologize for this delayed reply to your gardening question and hope it is still helpful to you.
Pruning can delay bloom by removing potential bloom buds. Don't prune them for a while and see if they start blooming. In the meantime, fertilize only moderately with a complete fertilizer product, and give them enough water to maintain moderate vigor. Also they need full sun to bloom well.
Thanks for the question. Best wishes for a wonderful gardening year in 2007. Please stop in again soon!
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