perennialN. America Native

Valentine's Crush Rose Mallow

Hibiscus 'Valentine's Crush'

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Essentials

At a Glance

Plant Type

Perennial

Height

60 inches

Width

60 inches

Light

Full Sun

Zones

4, 5, 6, 7, 8, 9

Water

High

Humidity

High

Lifespan

Long-lived perennial

Native To

North America (parentage)

Toxicity

Non-toxic

The Story

Plant Bio

Hardy Hibiscus (Rose Mallow) are large, shrub-like perennials native to North American wetlands. They are famous for their enormous, tropical-looking flowers that bloom in late summer when many other plants are fading. 'Valentine's Crush' is a standout in the Summerific series, featuring huge 7-8 inch, ruffled, scarlet-red flowers with overlapping petals for a full look. It has an upright, well-branched habit with deep green, maple-like leaves, and it blooms prolifically from top to bottom.

Bloom Period:

EarlyLate

Uses & Benefits:

With its dinner-plate-sized scarlet flowers, 'Valentine's Crush' provides a spectacular, tropical-like display in the late summer garden. It creates an instant focal point and brings dramatic, bold color to the back of the border or a large container.

This hardy perennial offers the look of a tropical hibiscus but is hardy to zone 4. It thrives in moist to wet soils, making it an excellent choice for rain gardens, pond margins, or other consistently damp areas in the landscape.

The large, nectar-rich flowers are highly attractive to pollinators, including hummingbirds, butterflies, and especially native bees like the Rose Mallow Bee, which specializes in pollinating Hibiscus.

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Where to Buy

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Planting

How to Grow

Select a site in full sun with moist, fertile soil.
Hibiscus are heavy feeders; amend soil with compost.
Dig a hole twice the width of the pot.
Set the plant at the same depth it was growing in the container.
Backfill with soil and water deeply.
Apply a thick layer of mulch to conserve moisture.

Pro Tip

Be patient in spring; hardy hibiscus are one of the last perennials to emerge, often not showing growth until late May.

Keep It Thriving

Care Guide

Do

Provide at least 6 hours of direct sun for best flowering.
Keep the soil consistently moist, especially during hot weather.
Fertilize in spring to support its vigorous growth.
Cut the entire plant back in late fall or early spring.

Don't

Do not let the soil dry out completely.
Avoid planting in deep shade, which will result in few to no flowers.
Don't be alarmed if it's slow to emerge in spring; this is normal.
Avoid high-phosphorus fertilizers, which can harm the plant.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Pest Check
Plant
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Dramatic late-summer specimen plantBold anchor for the back of a perennial borderStunning addition to rain gardens or pond edges

Companion Plants

Panicum virgatum Eupatorium 'Gateway' Lobelia cardinalis Phlox paniculata 'Jeana' Canna 'Tropicanna'

Multiply

Propagation Methods

Good to Know

Common Questions

Valentine's Crush Rose Mallow questions

What zones can Valentine's Crush Rose Mallow grow in?

Valentine's Crush Rose Mallow is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Valentine's Crush Rose Mallow deer resistant?

Yes — Valentine's Crush Rose Mallow is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Valentine's Crush Rose Mallow bloom?

Valentine's Crush Rose Mallow typically blooms in mid-summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Valentine's Crush Rose Mallow need full sun?

Valentine's Crush Rose Mallow does best in full sun (6+ hours).