The Story
Plant Bio
Nassella tenuissima, commonly known as Ponytail Grass or Mexican Feather Grass, is a graceful ornamental grass with fine, thread-like leaves and feathery flower panicles.
The fine-textured foliage sways beautifully in the slightest breeze, creating a soft, cloud-like effect. Can be invasive in some regions.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Grass
Height
24 inches
Width
24 inches
Light
Full Sun, Partial Sun
Zones
6, 7, 8, 9, 10
Water
Low to moderate
Humidity
Adaptable
Lifespan
Short-lived perennial or annual
Native To
Southwestern US, Mexico, Argentina
Toxicity
Non-toxic to pets and humans
Planting
How to Grow
- Tuck seeds into well-draining soil in early spring.
- Water regularly until seedlings establish, about 6 weeks.
- Mist cuttings with water to encourage root growth.
- Transplant seedlings when they reach 4 inches tall for best results.
- Apply a light layer of mulch in spring to retain moisture.
- Fertilize with a balanced, slow-release fertilizer in early summer.
Pro Tip
Ensure excellent drainage to prevent root rot and promote healthy growth.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Prune dead or damaged leaves in late winter
- Apply balanced fertilizer in spring
Don't
- Avoid overwatering to prevent fungal issues ❌
- Do not fertilize in late fall
- Avoid heavy soil without proper drainage
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Deadhead | ||||||||||||
| Divide | ||||||||||||
| Prune |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Ponytail Grass questions
What zones can Ponytail Grass grow in?
Ponytail Grass is hardy in USDA Zones 6–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Ponytail Grass deer resistant?
Yes — Ponytail Grass is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Ponytail Grass bloom?
Ponytail Grass typically blooms in late spring to early summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Ponytail Grass need full sun?
Ponytail Grass does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Ponytail Grass drought tolerant?
Yes — once established (usually after the first full season), Ponytail Grass handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Nassella to compare
Keep exploring
Explore the genus
Hardy in your zone?
Grow Ponytail Grass 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.