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.

24 varieties5 speciesZones 4–10Mostly full sun

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

ProblemWhat you'll seeWhat to do
AphidsSticky residue and distorted leavesUse insecticidal soap or neem oil
Spider MitesFine webbing and speckled leavesIncrease humidity and apply insecticidal soap
Spider mitesWebbing and speckled leavesUse horticultural oil or insecticidal soap
Generally pest-freeNo significant insect damage is typicalMonitor only; no routine treatment needed
RustOrange pustules on leavesRemove affected foliage and apply fungicide
Root rotWilting and yellowing leavesImprove drainage and reduce watering
Fungal leaf spotBrown or black spots on leavesApply fungicide and improve air circulation

Making more Pennisetum

Division

  1. Dig up mature clump in early spring
  2. Divide into smaller sections with roots intact
  3. Replant immediately in prepared soil
  4. Water thoroughly and mulch

Seeds

  1. Tuck seeds into moist soil in early spring
  2. Keep soil consistently moist during germination
  3. Thin seedlings to proper spacing after emergence
  4. 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.

Keep exploring