Seashore Mallow
Kosteletzkya virginica
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
48 inches
Width
36 inches
Light
Full Sun, Partial Sun
Zones
5, 6, 7, 8, 9
Water
Moist to wet
Humidity
Prefers moderate to high humidity
Lifespan
Perennial
Native To
Eastern and Southern United States
Toxicity
Non-toxic
The Story
Plant Bio
A robust, shrub-like perennial with triangular or arrowhead-shaped, hairy, gray-green leaves. In summer, it produces an abundance of pink, hibiscus-like flowers with 5 petals and a prominent central staminal column. This species is notable for its salt tolerance and ability to thrive in coastal marshes and wetlands, making it an excellent choice for wildlife gardens and erosion control.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into moist soil in early spring
- Water regularly until established, about 6 weeks
- Place in full sun for best flowering
- Fertilize monthly during growing season
- Divide in early spring or fall every 2-3 years
- Mulch around base to retain moisture
Pro Tip
Ensure well-drained soil and full sun for best performance.
Keep It Thriving
Care Guide
Do
- Water deeply during dry spells 🌱
- Prune lightly after flowering
- Mulch to conserve moisture
- Fertilize with balanced fertilizer monthly
Don't
- Overwater leading to root rot ❌
- Allow soil to become waterlogged ❌
- Neglect pruning after flowering ❌
- Use chemical pesticides excessively ❌
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Propagate | ||||||||||||
| Prune |
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
Seashore Mallow questions
What zones can Seashore Mallow grow in?
Seashore Mallow is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Seashore Mallow deer resistant?
Not reliably. Deer may browse Seashore Mallow, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Seashore Mallow bloom?
Seashore 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 Seashore Mallow need full sun?
Seashore Mallow does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
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Grow Seashore 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.
