Hibiscus, Summerific® Holy Grail HibiscusHoly Grail Hibiscus is a vigorous woody perennial with a mounding habit and hardy upright stems and lobed near black foliage with hairy undersides. The huge, textured dark red flowers bloom throughout summer into fall attracting butterflies. Best bloom in full sun and moist well drained soils. The Summerific series blooms all long the stems instead of just at the stem ends like most older hibiscus varieties. Type: Perennial Origins: SE Native, Rose