Lavender flowers 7 to 8 inches across, with thick, overlapping petals, open on this upright rose mallow. Hibiscus Summerific® 'Lilac Crush' grows 5 to 5 1/2 feet tall and 4 to 4 1/2 feet wide in full sun or part sun, hardy from Zone 4 through Zone 9, and takes two or three summers to reach full height.
The plant grows in a sturdy, upright column that resists flopping, and bloom runs long from midsummer on.
Hardy hibiscus, also called rose mallow, comes from species native to marshes and wet ground across eastern North America, and the modern hybrids keep that tolerance for heavy, damp soil along with full sun and summer heat. Each flower lasts one to two days, but a plant sets enough buds to keep new ones opening for weeks, and hummingbirds and bees come to the big flowers. Rose mallow is one of the last perennials to wake up in spring, often not showing until late May, so a bare spot in April is normal. The stems die back to the ground each winter.
Its height makes it a seasonal screen along a fence, a patio edge or a wet property line.
Size at Maturity
Height 60"- 66" Spread 48"- 54"
Growing Zone
USDA Hardiness Zones 4-9
Lowest Temperatures -30°F to -20°F
Light Requirements
Full sun to part sun- at least 4 hours direct sun per day
Wildlife Benefits
Special Conditions
Seasons of Interest
How to Plant
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