Proven Winners® Summerific® Holy Grail Hardy Hibiscus
- Stay Protected with Plant Sentry ™
Proven Winners® Summerific® Holy Grail Hardy Hibiscus - #2 Container is backordered and will ship as soon as it is back in stock.
Plant Sentry™
Plant Sentry™
Plant Sentry is designed to protect both consumers and the nursery trade from invasive plant pests and diseases. Sites that display the Plant Sentry protection badge are protected from consumers buying and nurseries shipping material carrying invasive pests and diseases.
This proprietary eCommerce software prevents the shipment of a restricted plant to each state. The Plant Sentry system includes a shipment certification program. The Plant Sentry Compliance Officer works closely with NatureHills.com and each nursery or fulfillment center to ensure only compliant plants are sold to customers.
Click Here to learn more
Delivery and Shipping
Delivery and Shipping
Shipping
To obtain a more accurate shipment time-frame, simply enter your zip code in the “Find Your Growing Zone” box to the right. Our plants are grown all over the country and lead time on items may be different because of this. Once your order is placed, you will also receive the specific shipment time-frame information as part of your order confirmation. Once an item ships, you will receive shipment notification and tracking numbers, so you can follow along while your plant travels to your doorstep. We use FedEx, UPS, or USPS at our discretion.
Due to winter weather we have put a hold on shipping to the areas shown below in grey. You can still order now and we will ship the plant to you during an appropriate time for your zone.
Standard Shipping Rates
At Nature Hills we handle, package and ship the products you order with the utmost care to ensure healthy delivery. Shipping and handling charges are calculated based on the tables below. Please note that some items include an additional handling surcharge, these will be noted on the item's product page.
| From | To | S&H |
|---|---|---|
| $0 | $19.99 | $24.99 |
| $20 | $49.99 | $29.99 |
| $50 | $69.99 | $34.99 |
| $70 | $99.99 | $39.99 |
| $100 | $129.99 | $44.99 |
| $130 | $149.99 | $48.99 |
| $150 | $150+ | Approx 28% |
Click here to see our full rates
Buying Options for Plants
Nature Hills sells a large variety of plants with several options available. Plants are offered in both potted containers and as dormant bare root without soil. Here is a helpful resource to understand your options as you create a beautiful landscape with help from Nature Hills.
Ever wonder what a larger plant will mean for your landscape? Container Sizes are really all about the age of the plant!
Seasonally, Nature Hills offers hand selected, high quality bare root trees, shrubs and perennials. Bare root plants are sold by height from the top of the root system to the top of the plant. Plants may be taller than the height minimums.
- Popular sizes of select trees are 1 foot, 2 feet, 3 feet, etc.
- Popular sizes of select bare root plants is 1 foot, 18 inches, etc.
Nature Hills Container Size by Volume
Keep in mind, specific varieties and different growing conditions can affect the rate at which plants grow. Variations in size may occur.
| Young Plants to 18 Months | ||
|---|---|---|
| Size | Volume | |
| 2"x2"x3" | Ranges from | .18 to .21 dry quarts / .198 to .23 dry liters in volume |
| 4.5" Container | Equal to | .65 dry quart / .72 dry liter in volume |
| Sprinter Pot | Equal to | .63 dry quart / .69 dry liter in volume |
| 4" Container | Ranges from | .31 to .87 / .35 to .96 dry liter in volume |
| 6" Container | Equal to | 1.4 dry quarts / 1.59 dry liters in volume |
| 1 Quart | Equal to | 1 dry quart / 1.1 dry liter in volume |
| 5.5" Container | Equal to | 1.89 of a dry quart / 2.08 dry liters in volume |
| 4"x4"x5" | Ranges from | .8 to 1.1 dry quarts / .88 to 1.2 dry liters in volume |
| 4"x4"x6" | Ranges from | 1.0 to 1.3 dry quarts / 1.1 to 1.41 dry liters in volume |
| 4"x4"x9" | Ranges from | 1.1 to 2.1 dry quarts / 1.2 to 2.3 dry liters in volume |
| 4"x4"x10" | Ranges from | 1.7 to 2.3 dry quart / 1.87 to 2.53 dry liters in volume |
| Plants 18 Months - 2.5 Years Old | ||
|---|---|---|
| Size | Volume | |
| 2 Quart | Equal to | 2 dry quarts / 2.2 dry liters in volume |
| #1 Container | Ranges from | 2.26 to 3.73 dry quarts / 2.49 to 4.11 dry liters in volume |
| 5"x5"x12" | Equal to | 3.5 to 4.3 dry quarts / 3.85 to 4.74 dry liters in volume |
| Plants 2 - 4 Years Old | ||
|---|---|---|
| Size | Volume | |
| #2 Container | Ranges from | 1.19 to 1.76 dry gallons / 5.24 to 7.75 dry liters in volume |
| #3 Container | Ranges from | 2.32 to 2.76 dry gallons / 10.22 to 12.16 dry liters in volume |
| Plants 3 - 5 Years Old | ||
|---|---|---|
| Size | Volume | |
| #5 Container | Ranges from | 2.92 to 4.62 dry gallons / 12.86 to 20.35 dry liters in volume |
| #6 Container | Ranges from | 5.25 to 6.01 dry gallons / 23.12 to 26.42 dry liters in volume |
| #7 Container | Ranges from | 5.98 to 6.08 dry gallons / 26.34 to 26.78 dry liters in volume |
Proven Winners® Summerific® Holy Grail Hardy Hibiscus
Plant Highlights
Proven Winners® Summerific® Holy Grail Hardy Hibiscus highlights at a glance!
Plant Highlights
Plant Highlights
-
Brand
-
Botanical Name
-
Growing Zones
-
Mature Height
-
Mature Spread
-
Sun ExposureFull Sun, Partial Shade
-
Moisture
-
Soil
-
Growth RateMedium
-
Flower Color
-
Pollinator Friendly
-
Pruning Time
-
Bloom PeriodSummer, Fall
Growing Zones
Proven Winners® Summerific® Holy Grail Hardy Hibiscus
The Proven Winners® Summerific® Holy Grail Hardy HibiscusUSPP31478 (Hibiscus x 'Holy Grail') is a spectacular, cold-hardy ornamental perennial that delivers massive, deep red blooms against rich, near-black foliage, creating a breathtaking contrast in any garden. This show-stopping Hibiscus produces 8-9 inch flowers from midsummer to early fall, ensuring your landscape is bursting with tropical color for months.
Perfect for pollinator gardens, borders, and containers, this low-maintenance, deer-resistant Hibiscus thrives in full sun and loves warm, sunny locations. With its compact, bushy growth habit, Proven Winners® Summerific® Holy Grail Hardy Hibiscus makes an unforgettable focal point in any garden design.
>>Jump to Planting & Care Instructions
Key Features of Summerific® Holy Grail Hardy Hibiscus
- Massive Deep Red Blooms – Stunning 8-9 inch flowers cover the plant all summer.
- Dark Burgundy-Black Foliage – A bold contrast against the vivid red blooms.
- Long Blooming Season – Enjoy continuous flowers from midsummer through early fall.
- Cold Hardy Perennial – Returns year after year in USDA zones 4-9.
- Pollinator-Friendly – A top choice for hummingbirds, butterflies, and bees.
- Heat & Humidity Tolerant – Thrives in hot summer conditions.
- Compact & Bushy Habit – Grows 4-5 feet tall and wide, ideal for landscapes and large containers.
- Deer & Rabbit Resistant – Foliage naturally repels browsing animals.
- Low Maintenance & Easy to Grow – Drought-tolerant once established.
Landscaping With The Summerific® Holy Grail Hardy Hibiscus
With its dramatic foliage and giant flowers, this Proven Winners® Hardy Hibiscus is an incredible addition to any garden. Use it to:
- Create a Stunning Garden Focal Point – Bold red flowers and dark foliage make a dramatic impact.
- Enhance Pollinator Gardens – A must-have for attracting hummingbirds, butterflies, and bees.
- Add a Tropical Touch to Mixed Borders – Complements plants like Coneflowers, Black-Eyed Susans, and Ornamental Grasses.
- Frame Walkways & Foundation Plantings – Compact growth makes it perfect for sunny garden beds.
- Make a Statement in Large Containers – Grows beautifully in big pots for patios and balconies.
- Use in Mass Plantings for a Lush Effect – Create a wall of color and foliage for a breathtaking display.
Growing & Care Tips
Hardy Hibiscus are very easy to grow despite their tropical appearance!
- Sunlight: Thrives in full sun (at least 6+ hours daily).
- Soil: Prefers moist, well-drained soil but adapts to a variety of conditions.
- Mulch: Top-dress the area with 3-4 inches of arborist bark chips to keep soil moisture consistent.
- Water Needs: Moderate to high; keep soil evenly moist during the growing season.
- Pruning: Cut back stems to the ground in late fall or early spring for healthy regrowth.
- Spacing: Plant 4 feet apart for the best coverage and airflow.
Order Proven Winners® Summerific® Holy Grail Hardy Hibiscus!
If you're searching for a jaw-dropping Hibiscus with bold red blooms and dark foliage, Proven Winners® Summerific® Holy Grail Hardy Hibiscus is the perfect choice! With massive flowers, pollinator-friendly appeal, and easy-care maintenance, this perennial is sure to be a garden highlight.
Order today and enjoy the breathtaking beauty of this incredible Rose Mallow variety in your landscape!
Frequently Asked Questions About Hardy Hibiscus
Is Summerific® Holy Grail Hardy Hibiscus a perennial?
Yes! This cold-hardy perennial Hibiscus returns every year, providing stunning tropical-style blooms in the summer.
Does Summerific® Holy Grail Hibiscus attract pollinators?
Absolutely! The large, nectar-filled flowers are a favorite of hummingbirds, butterflies, and bees.
Is this plant deer-resistant?
Yes! While not completely deer-proof, Hibiscus plants are not a preferred food source for deer and rabbits.
How tall does Summerific® Holy Grail Hardy Hibiscus grow?
This variety reaches 4-5 feet tall and wide, making it perfect for landscape borders and large container gardens.
Can it be grown in containers?
Yes! Its compact, bushy habit makes it an excellent choice for large containers and patio planters.
Why Order From Nature Hills Nursery?
Nature Hills Nursery is committed to bringing the highest-quality plants to your door. Join thousands of happy customers and get all your planting needs at Nature Hills! We guarantee our plants for their first year! Check out lifelong support and landscaping ideas in our #ProPlantTips Garden Blog and online at customer-support.naturehills.com!
