The Story
Plant Bio
A large, fast-growing, woody-based perennial native to wetlands of the southeastern U.S. It is noted for its very large, hollyhock-like, pink or white flowers and large, velvety, heart-shaped leaves.
The entire plant, especially the leaves, is covered in soft, velvety hairs. Its flowers are among the largest of the native North American hibiscus species, typically blooming from mid-summer to fall.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
72 inches
Width
48 inches
Light
Full Sun, Partial Sun
Zones
7, 8, 9, 10
Water
High
Humidity
Moderate to high
Lifespan
Perennial
Native To
Southeastern United States
Toxicity
Non-toxic to humans and pets
Bloom period
Mid-summer – Late summer
In flower about 2 months of the year
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into well-draining soil in spring for best germination.
- Mist cuttings regularly to maintain humidity and encourage rooting.
- Transplant young plants after frost danger has passed, typically late spring.
- Water deeply and consistently during the growing season for lush blooms.
- Prune after flowering to promote bushy growth and remove dead branches.
- Apply a balanced fertilizer monthly during the growing season for vibrant flowers.
Pro Tip
Use organic compost to enrich soil and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not waterlogged 🌱
- Prune after flowering to shape and encourage new growth
- Fertilize monthly during active growth for best blooms
- Mulch to conserve moisture and suppress weeds
Don't
- Avoid overwatering which can cause root rot ❌
- Don’t fertilize in late fall to prevent unwanted soft growth
- Refrain from pruning in late fall or winter
- Do not plant in poorly drained areas
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Prune | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Swamp Rose-Mallow questions
What zones can Swamp Rose-Mallow grow in?
Swamp Rose-Mallow is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Swamp Rose-Mallow deer resistant?
Not reliably. Deer may browse Swamp Rose-Mallow, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Swamp Rose-Mallow bloom?
Swamp Rose-Mallow 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 Swamp Rose-Mallow need full sun?
Swamp Rose-Mallow does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Hibiscus to compare
Midnight Marvel Swamp Hibiscus
Hibiscus moscheutos 'Midnight Marvel'
Rose of Sharon Hibiscus
Hibiscus syriacus 'Azurri Blue Satin'
Blue Chiffon Rose of Sharon
Hibiscus syriacus 'Blue Chiffon'
Confederate Rose
Hibiscus paramutabilis
Pink Chiffon Rose of Sharon
Hibiscus syriacus 'Pink Chiffon'
White Chiffon Hibiscus
Hibiscus syriacus 'White Chiffon'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Swamp Rose-Mallow with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.