Viola aalsmeer, a member of the violet family, is a hybrid that offers a larger bloom than typical varieties. Grown as both annuals and perennials, viola aalsmeers favor cool, moist conditions. They are compact plants that grow up to 10 inches tall and sport 1 1/2- to 2-inch flowers. The intense green foliage frames heart-like, scalloped petals that overlap a tiny yellow and white eye. In splendid shades of reds, golds and purples and variegated blends, these delicate blossoms are perfect for flowerbeds, window boxes or containers.
Prepare containers for planting by filling each with a blend of one part seed starting potting mix, one part compost and one part water to create a slightly moistened base. Seeds can be started indoors, 10 to 12 weeks before the last frost.
Sow one or two viola aalsmeer seeds per container at a depth of 1/8 inch and cover lightly with potting mix, then water each container thoroughly to set the seeds. Germination can take from 14 to 21 days.
Prepare the transplanting site after all chance of frost has passed for the season. Choose a location that offers well-draining soil and partial shade.
Amend soil with 1 to 2 inches of compost and general purpose fertilizer, according to manufacturer's directions, and dig a hole as deep as the seedling container for each viola plant, allowing 6 inches of space between plants.
Transplant viola seedlings to their new location. Gently remove the root ball from the seedling container and set it into the hole. Cover the seedling with soil up to the base of the plant and water each transplanted seedling thoroughly to remove air pockets and allow it to settle.
Add fertilizer, according to manufacturer's recommended dosage, once a month after planting; water viola aalsmeers at least once a week to maintain even moisture.