If you would like Rose of Sharon or more of them, you can always start them from seed. Rose of Sharon bushes tend to have many seed pods. Look along the length of the branches, you can find the seed pods that developed from the fertilized flowers.
You can gently roll the seed pods until they crack open and extract the seeds. There will be anywhere from a half a dozen to dozens.
Seeds can be planted indoors 6-8 weeks before last frost or outdoors after the last frost. Indoors the can be grown under lights or in a windowsill. Use potting soil or sifted garden soil. Clean and sterile soil will result in better germination. Seeds generally sprout better and are less likely to "damp off" if the temperature is between 68 and 72 degrees Fahrenheit. Be sure not to let the pots dry out, but don't drown them with too much water. They aren't desert plants but they are also not swamp plants. If all goes well, you should see the seeds sprouting.
Once they have grown new leaves, they will be ready to moved into larger containers.
Seedlings will adapt to being outside by hardening them off in a shaded area.
If started earlier, it is possible for seedlings to bloom the first year. Most will bloom the second year. Regardless, small seedlings benefit from adequate space and light. If you stake them individually, they are less likely to be damaged and grow more quickly. They will bloom once they get 12-36" and depending on the variety can grow to 6' (2M) by the second year.
Happy growing.
