Chaters Double Hollyhock Seeds

Plant your Double Hollyhock seeds ¼ inch into the soil, but no deeper, as germination will slow down significantly. The soil temperature needs to be at least 65°F for better germination. Seedlings will appear 10 to 14 days after sowing. If you want to get as natural as possible, try direct sowing your alcea rosea seeds in late summer or fall, and let the winter weather take care of the stratification. If you must start your Hollyhock seeds indoors, six weeks before the last frost date is sufficient, as Hollyhocks don't transplant well and don't like to be root-bound.

Full sun is non-negotiable. If they get less than six hours of it, the stalks will lean, the blooming will be reduced, and rust will develop. Average garden soil is perfectly fine. These are not picky about soil, but drainage is important. Waterlogged roots in clay soil will kill them before they ever get big enough to bloom. Water holly hocks seeds well while they are getting established, and after that, an occasional drought won't even phase them. 

Space the Double Hollyhock seeds 18-36 inches apart. Crowding will cause rust spreading. Staking is seldom required, except in a windy position, and the tap roots surprise you by how well they hold in the ground. Deadheading spent flowers will prolong the flowering season, but if you want them to self-seed, leave some seed heads until the end of the season. These are good for cut flower bouquets, as they last up to one week in vase, and dried Hollyhock flowers are actually useful for wreaths and other crafts. Feed once in the spring with a balanced slow-release fertilizer, and that is probably all they need for a strong display in their second year.