Can you grow rose of sharon from the fallen off flowers or buds besides just cut off branches ?
Planting Rose of Sharon Plants
Flowers will not yield a new plant. If it develops into a seed, you can plant the seed. However, a hybrid rose of sharon will not come true from seed. This is why cuttings are a good idea if you wan't to replicate flower color and size. This time of year isn't the best for cuttings. Take a 4-6" cutting of new growth next spring.