Holy Grail Hardy Hibiscus - Bare Root Plant

Name: Holy Grail Hardy Hibiscus - Bare Root Plant
Brand: Great Lakes Lavender Farm
SKU: GLLF-PER-0D3944AC-BR
Price: 20.85 USD
Availability: InStock

$20.85

$20.85 $39.36

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Size : Bare Root Plant

Bare Root Plant

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Who

What

Where

When

Why

How

Why some shipping routes differ

Live plants are pickup only June 1–September 30. Plugs and potted plants cannot use our shipping path to AZ, CA, HI, ID, NV, OR, UT, or WA; pickup may remain available. Soil-free bare root plants may ship to those states during March 1–May 31 when all remaining rules pass. Montana plug and potted-plant arrivals must be October 1–May 31.

We choose neem oil and lower-impact plant care instead of routinely drenching our greenhouse with lab-manufactured pesticides. We are exploring a screened growing house that may expand future shipping options.

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Bare root arrives dormant

Expect new growth in 10 weeks or more after planting. Until then it can look lifeless, so you won’t be able to tell within 24 hours of arrival whether it will grow.

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About the Product

Holy Grail pairs near-black, oval leaves with enormous deep red flowers 8 to 9 inches across. The red and black work together for a dramatic look, and after the petals drop, bright green calyces add one more layer of contrast.

It grows 4 to 4½ feet tall and 4½ to 5 feet wide and blooms from midsummer into early fall. It has won several trade and trial awards. Plant it in a spot with steady moisture and build a bed around it as the focal point.

What it looks like

A full, rounded bush 48 to 54 inches tall and 54 to 60 inches wide of oval, near-black leaves. Flowers are 8 to 9 inches across, saucer-shaped, rich deep red with smooth overlapping petals. Bright green calyces remain after the flowers fall. At peak the dark mound is lit with many huge crimson-red saucers.

Growing it with lavender

It likes full sun but needs far more moisture than lavender, so plant it in a regularly watered border or rain garden rather than in the lavender bed.

Care

Give it full sun to bring out the darkest leaf color. It grows in poor to fertile soil but needs consistent moisture; hardy in zones 4-9. It emerges late in spring, so mark its spot, and cut old stems to the ground in late fall or early spring.

At a glance

Botanical name: Hibiscus
Flower color: Rich deep red
Foliage: Near-black
Growth habit: Full, rounded bush
Mature size: 4 ft–54 in tall × 54 in–5 ft wide
USDA hardiness zones: 4–9
Light: full sun, part sun to part shade
Bloom start: Mid-July
Peak bloom: Mid-August
Bloom pattern: Long Blooming
Deer resistance: Moderately resistant
Pollinator value: Great

Sizes and shipping

Dormant bare-root plant, sold in boxes of 25 per variety (order in multiples of 25). Bare-root plants ship or are picked up March 1–May 31 only. They are soil-free, so they may ship to every state in that window. Dormant plants often show little or no top growth on arrival; plant or heel them in promptly. Hardy hibiscus arrives fully dormant and is one of the last perennials to wake up: expect no new growth until late May or June. That is normal, so plant it, water lightly and be patient.

Shipping note: Emerges late; dormant crowns look lifeless in spring until growth starts in late May or June.

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Holy Grail grown by our community

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Mature height: 54.0 in
Mature spread: 60.0 in
Bloom: Mid-July – peak Mid-August
Fragrance: None
Deer: Moderately resistant

Lavender companion · grow guide

How to grow Holy Grail

Hardy Hibiscus · Hibiscus

Hardy hibiscus (rose mallow) needs full sun, rich soil and plenty of water. It dies to the ground each winter and is one of the very last perennials to wake up in spring.

Check my zone & planting dates

Full sunLight
High waterWet tolerant drainage
pH 5.5–7.0Soil
Zones 4a–9bHardiness
54″ tall60″ wide
Some resistanceDeer · rabbits some resistance
Not known toxicPets

Huckleberry saysTell me where you grow and I’ll check if Holy Grail will thrive there.

or pick your zone

Hardy in zones 4a–9b

Late spring once soil has warmed, through early summer.

Dormant bare-root hardy hibiscus as it arrives, laid on burlap

When it arrives

Your bare-root plant

Arrives as a cluster of thick, tan, carrot-like roots with a woody crown and cut stem stubs; it looks lifeless. Soak 30–60 minutes, plant crown just below soil, water well and be patient: shoots may take until late spring.

Expect new growth in 10 weeks or more after planting. Bare root ships March–May while dormant, with little or no top growth, and it can look lifeless until then. That’s normal. Very late: new shoots often don't appear until late May or June in Michigan, once soil is warm. Don't dig it up. Mark its spot in fall so you don't damage it while you wait.

You won’t be able to tell within 24 hours of arrival whether a dormant plant will grow.

When to plant

Late spring once soil has warmed, through early summer.

How deep

Set the crown, where old stem stubs meet the roots, just below the soil surface with roots spread out.

Spacing

About 3–4 ft apart; mature plants are shrub-sized.

Soil

Loam or silt rich in organic matter · pH 5.5–7.0

Fix-it tip: Mix generous compost into sandy or poor soils to hold moisture. Slightly acidic soil is ideal. It tolerates wet, boggy soil better than drought.

Sun

Full sun (tolerates part sun).

Full sun gives the most flowers and best disease resistance.

Don’t give up on it

Is it alive? What spring looks like

Very late: new shoots often don't appear until late May or June in Michigan, once soil is warm. Don't dig it up. Mark its spot in fall so you don't damage it while you wait.