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Summerific® Holy Grail Hardy Hibiscus

Hibiscus x 'Holy Grail' PP31,478

Proven Winners®
  • Massive 8-9 Inch Deep Red Blooms Against Near-Black Foliage Create Stunning Garden Drama
  • Cold Hardy: Thrives in Zones 4-9
  • Grows 4-5 ft Tall and Wide
  • Pollinator-Friendly Shrub
  • Moderate-Growing in Full Sun to Partial Shade
$5243
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Plant Size
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Plant Sentry™ Protected

Your order is protected by our compliance system that:

  • Prevents restricted plants from shipping to your state
  • Ensures plants meet your state's agricultural requirements
  • Protects gardens from invasive pests and diseases

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Plant Characteristics Cold hardy, Fast-growing, Flowering, Wet Soils, Clay Tolerant, Heat Tolerant, Attracts pollinators, Container Friendly, Non-invasive
Sunlight Full sun, Partial shade
Height 4-5 ft
Width 4-5 ft
Watering Needs High
Growth Rate Moderate
Blooms In Summer, Fall
Flower Color Red
Suitable Space Outdoors
Plant Name Hibiscus
Botanical Name Hibiscus x 'Holy Grail' PP31,478
Species x
Cultivar Holy Grail
Class Magnoliopsida
Does Not Ship To AK, AZ, HI, ID, MT, PR

Frequently Asked Questions

What USDA hardiness zones is Summerific® Holy Grail Hardy Hibiscus suitable for?
  • Summerific® Holy Grail Hardy Hibiscus is cold hardy in USDA zones 4-9. This perennial will reliably return each spring in these zones, producing massive 8-9 inch blooms from midsummer through early fall. Plant in full sun for best flowering performance.

What is the mature size (height and width) of Summerific® Holy Grail Hardy Hibiscus?
  • Summerific® Holy Grail Hardy Hibiscus reaches 4-5 feet tall and 4-5 feet wide at maturity. This compact, bushy perennial fits perfectly in borders or large containers without overwhelming smaller plants. Give it adequate space to showcase its dramatic red blooms and dark foliage when you shop at Nature Hills.

Does Summerific® Holy Grail Hardy Hibiscus bloom the first year after planting?
  • Yes, Summerific® Holy Grail Hardy Hibiscus typically blooms in its first year after planting. You can expect those spectacular 8-9 inch deep red flowers to appear from midsummer through early fall, even on newly planted specimens. Plant in full sun and keep consistently watered the first season for best bloom production.

What are the sunlight requirements for Summerific® Holy Grail Hardy Hibiscus?
  • Summerific® Holy Grail Hardy Hibiscus requires full sun for optimal blooming and thrives in warm, sunny locations. This heat-tolerant perennial needs at least 6-8 hours of direct sunlight daily to produce its spectacular 8-9 inch red blooms. Plant in your garden's sunniest spot for the best flower production and healthiest growth.

What type of soil does Summerific® Holy Grail Hardy Hibiscus prefer?
  • Summerific® Holy Grail Hardy Hibiscus thrives in well-draining, fertile soil with consistent moisture. This hardy perennial adapts to various soil types but performs best in rich, organic matter-amended ground. Ensure good drainage to prevent root rot, and shop at Nature Hills for healthy plants ready to establish in your garden.

How much water does Summerific® Holy Grail Hardy Hibiscus need, and is it drought tolerant?
  • Summerific® Holy Grail Hardy Hibiscus is drought-tolerant once established, typically after its first growing season. During establishment, provide regular watering to keep soil consistently moist but not waterlogged. Once mature, it handles dry periods well but performs best with weekly deep watering during hot summer months.

Should I deadhead Summerific® Holy Grail Hardy Hibiscus, and is it necessary?
  • Deadheading isn't necessary for Summerific® Holy Grail Hardy Hibiscus to maintain its continuous midsummer to early fall bloom cycle. The plant naturally produces new 8-9 inch flowers throughout the season without intervention. You can remove spent blooms for tidier appearance, but focus your energy on other garden tasks instead.

Will Summerific® Holy Grail Hardy Hibiscus survive shipping damage or arrive healthy?
  • This hardy perennial is exceptionally resilient and handles shipping stress well due to its robust nature. The plant's natural heat and humidity tolerance, plus its ability to thrive in USDA zones 4-9, means it recovers quickly from transport. Plant immediately upon arrival and water thoroughly to help it establish.

How do I prune or cut back Summerific® Holy Grail Hardy Hibiscus in spring?
  • Cut Hardy Hibiscus stems down to 4-6 inches above ground level in early spring before new growth begins. In zones 4-6, wait until after the last frost date since stems provide winter protection. Make clean cuts just above outward-facing buds to encourage the plant's naturally compact, bushy habit.
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