For the best fall blooms, prevent mums from flowering in the spring by pinching back any buds that appear. In late spring, prune the mums, leaving about eight inches of new growth on the plant. Continue pinching off new buds until mid to late July, then leave them to allow them to form the new buds for fall.
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Robin Lewis Montanye is a freelance artist, designer and writer. Her articles have appeared in newspapers, national magazines and on several self-help areas of the web. Montanye specializes in gardening articles with information from several universities. She has Internet articles published on Gardenguides.com, eHow.com and Suite101.com.