Hibiscus syriacus 'Paeonyflorus' is a deciduous flowering shrub that thrives in USDA hardiness zones 5 to 9. Commonly known as rose of Sharon, the Paeonyflorus cultivar will reach from 8 to 12 feet in height and blooms late in the season in double flowers in shades of pale pink to lavender. Paeonyflorus is easy to care for. It is adaptable to any soil, requires no pruning and is heat- and humidity-tolerant. Plant your Hibiscus syriacus Paeonyflorus in spring or fall.
Amend the soil in the planting area by pouring a 2-inch layer of compost on the soil and, using a gardening fork, mixing it in to a depth of 8 inches.
Measure the pot in which the Paeonyflorus was grown. Dig a hole that is the same depth and twice the width.
Remove the hibiscus from its pot by tipping it upside down and giving it a sharp knock on the bottom of the pot.
Place the roots of the hibiscus into the planting hole, and cover them with soil. Add a bucket of water to the hole, and allow it to drain. This helps to settle the soil over the roots and removes air pockets. When it drains, finish filling the hole with soil. Press down around the base of the plant with your hands or feet.
Water the Paeonyflorus until the water puddles at its base. When it drains, spread a 3-inch layer of mulch around the base of the plant. Keep the mulch 2 inches away from the bark of the shrub, and spread it out 1 foot in all directions.