Q I finally got my garden mums to survive winter, but this year they are so much taller than they were last year. Why?
Marge Hunt, IL
A Garden mums ( hybrids) grown for sale as potted plants are often treated with plant growth regulators (PGRs). These hormones keep plants compact, making them easier to ship or display. The following year, planted in the garden, mums grow to their normal height. But you can keep them compact by using the pruning