How to Grow Fountaingrass
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Fountaingrass
Pennisetum spp.
grassPennisetum is a genus of ornamental grasses known for their distinctive feathery, fountain-like plumes and fine-textured foliage. These warm-season grasses add movement, texture, and visual interest to gardens and landscapes. They range from tender annuals to hardy perennials depending on the species and cultivar.
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Example Fountaingrass timeline · Pittsburgh, PA (Zone 6b)
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Plant Fountaingrass
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Fountaingrass
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Most species thrive in zones 6-10; some hardy varieties tolerate zones 4-5; tender varieties in zones 9-11
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Get my Fountaingrass timeline →Growth Stages
Seedling
2-4 weeksFine, hair-like leaves emerge; very delicate appearance
Keep soil consistently moist but not waterlogged; provide bright light; protect from wind
Juvenile Vegetative
6-8 weeksClumps develop; foliage thickens and reaches 12-18 inches tall; fine texture evident
Establish regular watering; begin spacing out waterings as root system develops; minimal fertilizer needed
Mature Vegetative
4-8 weeksFull clump established with dense foliage; plant reaches near full height; no plumes yet
Reduce watering frequency; fertilize lightly in spring if desired; ensure good drainage
Flowering/Plume Production
8-12 weeksDistinctive feathery, bottlebrush-like plumes emerge above foliage in purple, pink, red, or cream colors
Plumes appear in late summer through fall; minimize nitrogen fertilizer to enhance flowering; do not deadhead if you want self-seeding
Dormancy/Winter
3-5 monthsFoliage dies back in cold climates; plumes persist and turn tan/bronze; plant survives as dormant roots
In zones 6 and colder, cut back dead foliage in late winter before new growth (late February-March); leave standing in warmer zones for winter interest; no supplemental water needed
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap if severe; encourage beneficial insects like ladybugs
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Increase humidity; spray with water; use miticide or neem oil for severe infestations
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Remove and destroy affected stems; maintain plant vigor to resist infestations
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Hand-pick; use spinosad if population is severe; generally minimal damage to established plants
Uses
Grain and seed crop (some species)
CulinarySelect Pennisetum species produce edible grains and seeds used as a staple food crop in Africa and Asia, particularly pearl millet (Pennisetum glaucum). The grains are nutrient-rich and drought-tolerant. [source]
Cut and dried floral arrangements
HouseholdPennisetum plumes are prized for fresh and dried flower arrangements, adding texture and movement to indoor displays. Dried plumes last for months without water and create dramatic focal points in bouquets and installations. [source]
Ornamental and landscape design
CraftFountaingrass is widely used in contemporary and naturalistic garden designs to provide vertical accent, seasonal color, and graceful movement. The fine texture contrasts beautifully with broad-leaved perennials and shrubs. [source]
Wildlife habitat and food source
WildlifePennisetum provides shelter and nesting material for birds and small animals; seeds feed various bird species and wildlife throughout fall and winter. Standing dried plants offer winter structure and food in the garden. [source]
Traditional medicine (some species)
MedicinalCertain Pennisetum species have been used in traditional African and Asian medicine to treat digestive issues and inflammation, though scientific evidence is limited. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Cut flowering plumes when fully extended and feathery for fresh or dried arrangements; cut stems just above foliage base. For dried plumes, allow them to mature fully and dry on the plant, then cut. Collect seeds in late fall if desired by shaking mature dried plumes into a paper bag. Cut back all foliage in late winter (zones 6 and colder) or early spring before new growth begins.
Fun Facts
- 🌱 Pennisetum setaceum (Red Fountaingrass) is considered invasive in some southwestern U.S. regions and California due to its drought tolerance and prolific self-seeding, yet it is treasured in ornamental gardens elsewhere.
- 🌱 The name 'Pennisetum' comes from Latin 'penna' (feather) and 'seta' (bristle), perfectly describing the feathery appearance of the flowering plumes.
- 🌱 Pearl millet (Pennisetum glaucum), a staple crop in Africa, is one of the most drought-tolerant cereal crops and has been cultivated for over 4,000 years in the Sahel region.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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