Also known as Fountain Grass · 1.4k saves
Pennisetum
Pennisetum, the genus most gardeners know as fountain grass. We track 24 varieties; the ones most used by real gardeners.
The 23 most-saved Pennisetum varieties
Browse all 24 Pennisetum varieties →
5 species of Pennisetum
Each one is a parent of the varieties above.
Track your Pennisetum in Sow
Save the Pennisetum you grow and get care reminders timed to your zone.
How to grow Pennisetum
Whats common across all Pennisetum varieties in our catalog — drawn from the care records of the 24 most-grown of them.
The Pennisetum year
- DivideMarch and April75% of varieties
Divide large, crowded clumps every 3-4 years in early spring.
- PruneJanuary and February67% of varieties
Cut back old foliage to 4-6 inches before new growth starts in late winter
- PlantMarch–May46% of varieties
Plant transplants after the danger of frost has passed
- FertilizeMay33% of varieties
Apply a balanced, slow-release fertilizer in early spring
Do
- Water consistently during dry spells 🌱
- Water regularly during dry spells 🌱
- Water during dry spells 🌱
- Water regularly during dry periods 🌱
- Water deeply during dry spells 🌱
Avoid
- Avoid overwatering in winter ❌
- Avoid overwatering to prevent root rot ❌
- Overwater, which can cause root rot ❌
- Plant in poorly drained soil ❌
What goes wrong with Pennisetum
| Problem | What you'll see | What to do |
|---|---|---|
| Aphids | Sticky residue and distorted leaves | Use insecticidal soap or neem oil |
| Spider Mites | Fine webbing and speckled leaves | Increase humidity and apply insecticidal soap |
| Spider mites | Webbing and speckled leaves | Use horticultural oil or insecticidal soap |
| Generally pest-free | No significant insect damage is typical | Monitor only; no routine treatment needed |
| Rust | Orange pustules on leaves | Remove affected foliage and apply fungicide |
| Root rot | Wilting and yellowing leaves | Improve drainage and reduce watering |
| Fungal leaf spot | Brown or black spots on leaves | Apply fungicide and improve air circulation |
Making more Pennisetum
Division
- Dig up mature clump in early spring
- Divide into smaller sections with roots intact
- Replant immediately in prepared soil
- Water thoroughly and mulch
Seeds
- Tuck seeds into moist soil in early spring
- Keep soil consistently moist during germination
- Thin seedlings to proper spacing after emergence
- Transplant when established
Pennisetum questions
How many types of Pennisetum are there?
The Sow catalog tracks 24 distinct Pennisetum varieties. The most popular — ranked by 1.4k real gardeners — are shown first above.
What zones does Pennisetum grow in?
Across its varieties, Pennisetum covers USDA Zones 4–10. Individual varieties differ — each plant page lists its exact range, and Sow filters the catalog to your zone automatically.
When does Pennisetum bloom?
Most Pennisetum varieties bloom in late summer, summer, mid-summer. Staggering early, mid, and late varieties extends the genus's season in one bed.
Which Pennisetum should I choose?
Start from the most-saved varieties above — popularity across thousands of gardens is a strong signal of reliability — then filter by your zone and sun. In the Sow app you can preview any of them in a photo of your actual yard before you buy.























