Summerific® Holy Grail™ Rose Mallow

Summerific® Holy Grail™ combines deep mahogany, near-black foliage with large, rich red flowers and contrasting green calyces. Its rounded mound flowers from late July into early September, bringing a dramatic late-summer accent to the garden. ## Size and season The [Walters Gardens profile](https://www.waltersgardens.com/variety.php?ID=HIBHG) lists a height of 4–4½ ft, a spread of 4½–5 ft, and USDA Zones 4–9. It recommends full sun to part shade and steady moisture; the [plant patent](https://patents.justia.com/patent/PP31478) describes the red flowers, deep mahogany foliage, and late-July-to-early-September bloom. ## Growing conditions Choose a sunny or lightly shaded site with rich soil that stays evenly moist but drains well. The large flowers and very dark foliage make a strong focal point in a border or near a patio. ## Maintenance Water through dry summer weather and mulch the crown before winter. Leave old stems in place until spring, then cut them back as new shoots appear.