The U.S. National Chrysanthemum Society categorizes mum bloom forms into 13 categories or classes. ... Class 4. decorative — the most common mum — is grown as a potted plant or a disbud.

The flowers have been coaxed to an “unusual size” by disbudding the hybrids, which results in a large flower, Smith College said. Chrysanthemums are not usually bred to form this display.

They need disbudding and even require a paper bag over their heads to develop - hardly decorative. But dozens of chrysanthemums are not only perfect for late displays, but are among the easiest ...