Glads respond to fertilization and two different methods give good results. The other method is an application of liquid fertilizer every 10 days from the time the flower spike forms until the flowers begin to open. Corms planted on a staggered schedule through May and June provide a continuous supply of flowers. Corms are planted two and one-half to four inches deep and 10 to 20 inches apart. Corms planted deeper flower later and deeper planting can lead to disease problems.
Corms are ready to dig when the tops have died.
Remove the old shriveled corm, but the husks are left on. A few corms can be stored in onion sacks. Large numbers of corms are stored in shallow layers on trays with screen bottoms. The storage area should be well ventilated and have a temperature of 40 to 50 degrees. Propagation is by cormlets selected from certain varieties and planted one inch apart in a nursery row.