Approx: 5 inches tall, ship bare root. Tropical hibiscus, also known as Hibiscus Rosa-Sinensis, is one of the most popular indoor flowering plants. This double red hibiscus will be the strongest color in the garden and is a fast-growing shrub. Attracts bees and butterflies. Bold, Lush, and Tropical – Meet the Double Red Hibiscus! Turn your garden or patio into a paradise with the Double Red Hibiscus, a spectacular tropical bloomer with lush, layered petals in rich, deep red. Unlike single-petal varieties, this plant produces large, showy double blooms that resemble roses and bring drama and elegance to any outdoor space.