Glade Mallow
Napaea dioica
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
84 inches
Width
42 inches
Light
Full Sun, Partial Sun
Zones
4, 5, 6, 7, 8, 9
Water
Prefers moist to wet soil
Humidity
Prefers moderate to high humidity
Lifespan
Perennial
Native To
North America
Toxicity
Non-toxic to humans and pets
The Story
Plant Bio
Napaea dioica, commonly known as glade mallow, is a tall, dioecious perennial of the mallow family. It features large, deeply lobed, maple-like basal leaves and tall flower stalks bearing large, branched clusters (panicles) of small white flowers in summer. This species is dioecious, meaning male and female flowers are on separate plants. It is the only species in its genus and is notable for its impressive height and bold foliage, thriving in moist, sunny locations like prairies and stream banks.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring.
- Water gently to keep soil moist during germination.
- Transplant seedlings when they are 3 inches tall, after last frost.
- Space plants 12-18 inches apart for airflow.
- Mist cuttings every few days until roots develop, approximately 6 weeks.
- Mulch around base to retain moisture and suppress weeds.
Pro Tip
Ensure soil is well-draining to prevent root rot and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Deadhead spent flowers to encourage more blooms
- Mulch to conserve moisture and regulate soil temperature
Don't
- Overwater to avoid root rot ❌
- Use heavy clay soil without amendment
- Neglect pruning after flowering
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| 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
Glade Mallow questions
What zones can Glade Mallow grow in?
Glade 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 Glade Mallow deer resistant?
Not reliably. Deer may browse Glade Mallow, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Glade Mallow bloom?
Glade Mallow typically blooms in summer through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Glade Mallow need full sun?
Glade Mallow does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Keep exploring
Explore the genus
Collections featuring this plant
Grow Glade 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.
