Chrysanthemums should be pinched to develop a compact plant that won’t collapse or fall when flowering. An actively growing plant during spring and summer, properly fertilized and watered, will require 4 to 6 pinchings.Start pinching plants when shoots are 8 inches long. Pinch plants back by half. New shoots should develop within weeks. When these shoots are 8 inches long, pinch them back by half. As shoots reach 8 inches in height, prune back by half.
No pinching should occur after July 15th in order to develop a compact, blooming plant. Late pinching (after July 15) may remove flower buds.
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