Fall and spring are both good times of year to plant mums
Chrysanthemums are one of the most popular fall perennials for the garden according to Patrick Byers, horticulture specialist, University of Missouri Extension.
"There are scores of different cultivars of garden chrysanthemums from which to choose. Each year new cultivars with improved growth habits, flower color and garden performance are added," said Byers.
A relative newcomer has been the Belgium or European garden chrysanthemums. These cultivars are known for their spectacular size and display of color.
"Although individual flowers are smaller on these new varieties, they are borne in profusion making for quite a show in the garden," said Byers.
Garden chrysanthemums are available in the spring as rooted cuttings established in small containers or during the fall as large, mature plants in or near full bloom.
With most cultivars, spring planted mums should be pinched at regular intervals every three to four weeks to promote bush, compact growth and more flowers. With most cultivars, the last pinch should be made no later than mid-to late July.
"Fall is the most popular time to plant because of the instant color. Planting soils should be well-drained and moderately fertile. Both spring and fall are suitable for planting mums," said Byers.