Rose mallow Hibiscus × 'Summerific(R) Lilac Crush' is a bold, late-summer perennial that brings a tropical look to your garden without tropical fuss. You get oversized, lilac to lavender-blue blooms with ruffled petals held on sturdy, upright stems above a full canopy of green leaves.
Plant it where it can soak up sun for the biggest flower show. Full sun is ideal, but it will also perform in part shade, especially where summers are hot. Expect a mature height around 60-72 inches, with a broad spread that commonly reaches about 48-60 inches, so give it space to stand out rather than crowd it into the border.
For best results, grow it in consistently moist, well-drained soil. Regular watering through the growing season helps keep the plant lush and supports continuous flower production. A summer mulch layer helps hold moisture, and an extra-thick mulch the first winter is helpful in colder climates.
Like many hardy hibiscus, this plant is slow to wake up in spring. Be patient and avoid cutting it back in fall. Instead, once new growth is about to start (or just as it begins), cut back last year's stems before fresh shoots elongate. This simple routine keeps the clump tidy and encourages strong new stems for the season's blooms.