Rose of Sharon is a dramatic flowering shrub that is often pruned into a small tree formation. It can grow up to 8 feet high, and produces large white, blue or purple flowers. Rose of Sharon plants grow well in urban environments and tend to attract butterflies and hummingbirds. When grown from seed, they can take three to four years to mature and bloom. Germinate seeds from Rose of Sharon trees at home by collecting seeds immediately after seed heads form and preparing to germinate six weeks before last spring frost.
Fill a shallow pan 1 to 2 inches full of seed starter mix or well-draining potting soil.
Gently push each seed ¼ inch below the surface of the soil and cover with dirt. Leave ½ inch of space between each seed for optimal growth.
Use a spray bottle to fully mist the soil with purified water. Regularly mist seeds to prevent drying out during germination.
Place pan in a location with temperatures between 68-70 degrees Fahrenheit and indirect sunlight. Seedlings should emerge within 10 to 20 days.