Rose of Sharon: A Showy Summer Bloomer

9. Harvest the seeds to grow more plants

Because it’s a vigorous bloomer, Rose of Sharon also produces a lot of seeds. Seeds that drop to the ground after the flower fades will likely self-seed in a big way. Even if you want to produce more shrubs, it’s a good idea to control the process. First, start deadheading the flowers in October after the pods have dropped the seeds. Some gardeners place a nylon bag under the shrub to catch the seeds as they fall. Plant in ¼ to ½ inch soil in spring, making sure they’re getting full sun and plenty of water.