Species

Alcea roseaHollyhock

18 other cultivars

perennial

Double Hollyhock

Alcea rosea 'Double Hollyhock Mix'

The Story

Plant Bio

Tall, sturdy biennial with large, colorful, double flowers.

Unique mix of double flowers that provide an impressive display in borders and garden beds.

Uses & Benefits:

Double Hollyhock adds dramatic vertical interest with large, colorful blooms, ideal for cottage gardens and borders.

Provides natural privacy screening when planted in groups.

Supports pollinators like bees and butterflies with abundant nectar.

SpeciesAlcea roseaHollyhock

Essentials

At a Glance

Plant Type

Perennial

Height

72 inches

Width

24 inches

Light

Full Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Biennial or short-lived perennial

Native To

China

Toxicity

Non-toxic to humans and pets

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds 1/4 inch deep into well-draining soil in early spring.
Water consistently to keep soil moist but not waterlogged.
Provide full sun for optimal growth and flowering.
Stake tall stems to prevent bending in wind.
Fertilize monthly with a balanced fertilizer during the growing season.
Deadhead spent flowers to encourage more blooms.

Pro Tip

Plant in a sunny spot with good air circulation to reduce disease risk.

Keep It Thriving

Care Guide

Do

Water regularly during dry spells 💧
Deadhead to promote continuous flowering 🌸
Apply mulch to retain soil moisture and suppress weeds
Stake tall varieties to support stems

Don't

Avoid overwatering to prevent root rot ❌
Do not let soil dry out completely between waterings
Avoid overcrowding to improve air circulation
Don’t forget to remove faded flowers

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Pest Check
Plant
Spring Cleanup
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vertical flower wall with vibrant bloomsColorful border along garden pathwaysWildflower meadow accent

Companion Plants

Roses Lavender DelphiniumShasta daisies Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Double Hollyhock questions

What zones can Double Hollyhock grow in?

Double Hollyhock is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Double Hollyhock deer resistant?

Not reliably. Deer may browse Double Hollyhock, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Double Hollyhock bloom?

Double Hollyhock typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Double Hollyhock need full sun?

Double Hollyhock does best in full sun (6+ hours).

Is Double Hollyhock drought tolerant?

Yes — once established (usually after the first full season), Double Hollyhock handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.