Planting

• USDA plant hardiness zones 5, 6, 7 and 8 are the best regions for the rose of Sharon. It requires partial to full sunlight and grows best in well-drained sandy or clay soil.
  
  

Blooming

• According to the National Gardening Association, rose of Sharon grows to heights ranging from 8 to 12 feet, and spreads to a width of 6 to 10 feet. The shrub blooms from late summer to early fall, with flowers emerging from single or double buds.
  
  

Pruning

• Flowers bloom from same-year growth, so older branches must be pruned in the spring to ensure blooms during the same growing season. Failure to prune regularly will result in decreasing flower size, according to Virginia Cooperative Extension.