Hibiscus 'Holy Grail' PP 31,478
Holy Grail Hardy Mallow
Item #: 13759
Zones: 4a to 9b
Height: 54" tall
Origin: United States Hybrid
Hibiscus 'Holy Grail' is a 2018 Walters Gardens introduction that fulfilled their goal of creating a dark purple leaf hardy hibiscus with bright red flowers...a combination of traits that proved elusive previously. The 4.5' tall x 4.5' wide clump is clothed with dark purple foliage, and topped, starting in early summer with giant 9" wide, brilliant red flowers. Moist, rich, slightly acidic soils produce the best results.
Hibiscus 'Holy Grail' is a very low maintenance perennial, provided they are growing in the proper conditions. When the plants go dormant in winter, the stalks remain upright and sturdy. We prefer to leave them to give birds a place to perch. The structure also helps the garden remain much more interesting in winter than a flat carpet of brown mulch.
Hibiscus sawfly is the #1 pest of most hibiscus, causing skeletonized leaves. These can be treated with a beneficial bacteria product like Dipel, which contains BT bacillus.
Hibiscus like 'Holy Grail' grow naturally in standing shallow water, although they are quite drought tolerant for short period. The drier the soil, the more the plants will be stressed, which increases the severity of insect damage.
Perennial hardy hibiscus add an upright garden form to the garden, as well as summer flowering when many spring perennials have finished flowering or gone dormant. Also, there are few plants with such a floral show that tolerates wet soil.
Bees are the primarily pollinators of all of the herbaceous, hardy hibiscus.
Flower Color: Red
Leaf Color: Purple/Lavender
Bloom Time: Summer
Container Role: Thrillers
Other: Bog Garden Plants , Edimentals , Cut Flower Plants , Hummingbird Plants , Pollinator Plants , North American Native Plants , Ornamental Seed or Fruit , Plants that Attract Birds , Rabbit Resistant Plants , Rain Garden Plants , Salt Tolerant Seaside Plants , Tropical Looking Plants , Colored Foliage , United States Native Plants