How to Grow Colonial Bentgrass
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Colonial Bentgrass
Agrostis capillaris
grassColonial bentgrass is a fine-textured, cool-season perennial grass prized for high-quality turf applications, particularly in golf course fairways and fine lawns. It features delicate, hair-like leaves and dense growth, creating an attractive, carpet-like appearance. Known for excellent shoot density and disease resistance compared to creeping bentgrass.
When should you plant Colonial Bentgrass in your zone?
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Example Colonial Bentgrass timeline · Pittsburgh, PA (Zone 6b)
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Plant Colonial Bentgrass
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 Colonial Bentgrass
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Colonial Bentgrass dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-7, with best performance in cooler regions; marginal in zone 8
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Get my Colonial Bentgrass timeline →Growth Stages
Germination
7-14 daysTiny seedlings emerge with 2-3 fine leaves; very delicate appearance
Keep soil consistently moist but not waterlogged; apply light, frequent watering; avoid foot traffic; provide 55-65°F temperatures for optimal germination
Seedling/Establishment
4-8 weeksYoung grass develops root system and shoots; fine-textured leaves form dense mat; plants are 1-3 inches tall
Maintain consistent moisture; do not fertilize heavily; keep mowing height at 2-2.5 inches; protect from traffic and stress
Vegetative Growth
3-6 monthsDense, fine-textured turf develops; rhizomes and tillers spread; vibrant green color
Mow regularly at 0.75-1.5 inches depending on application; apply nitrogen fertilizer in spring and fall; overseed bare spots; manage thatch buildup
Reproductive/Seed Head
4-6 weeks (late spring to early summer)Fine seed heads emerge on delicate culms above the leaf canopy; appears slightly hazy in early summer
Mow frequently to remove seed heads and maintain appearance; increase mowing frequency during peak seed head production
Dormancy/Senescence
Variable by region (2-4 months winter dormancy)Grass turns dormant and brown during winter or extreme heat; reduced growth and green color
Reduce fertilization; maintain minimal irrigation; plan fall overseeding for recovery; avoid traffic on frozen turf
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Monitor for larvae and adults in early summer; apply insecticidal soap or neem oil; maintain healthy turf density
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Improve air circulation through aeration; reduce thatch; apply fungicide in warm, humid conditions; reduce nitrogen when conditions favor disease
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Avoid overwatering in evening; improve drainage; apply fungicide; increase mowing height slightly
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Ensure excellent drainage; reduce nitrogen in summer; apply fungicide during periods of high humidity; improve air circulation
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Apply insecticide in late spring; maintain adequate soil moisture; avoid excessive nitrogen
Uses
Golf Course Fairways
HouseholdColonial bentgrass is a premier choice for golf course fairways due to its fine texture, density, and ability to tolerate close mowing and heavy traffic. Its superior shoot density compared to creeping bentgrass makes it easier to maintain. [source]
Fine Lawns & Ornamental Turf
HouseholdCreates high-quality, attractive residential lawns with fine texture and dense coverage. Ideal for homeowners seeking premium lawn appearance in cool climates. [source]
Athletic Fields & Sports Turf
HouseholdUsed on premium sports fields, bowling greens, and lawn tennis courts where durability, dense coverage, and fine texture are required. Withstands regular use and traffic. [source]
Pollinator & Beneficial Insect Habitat
WildlifeWhen allowed to mature and produce seed heads, bentgrass provides food and habitat for beneficial insects and birds. Less intensive management supports ecosystem health. [source]
Erosion Control & Slope Stabilization
HouseholdThe dense root system and fine texture make colonial bentgrass effective for stabilizing slopes and controlling erosion on hillsides and embankments. [source]
Harvest Tips
Not harvested in traditional sense; maintain turf quality through regular mowing at 0.75-1.5 inches, seasonal maintenance, and disease management. Overseed annually in fall to maintain density and vigor.
Fun Facts
- 🌱 Colonial bentgrass is intermediate between creeping bentgrass (very fine, high maintenance) and velvet bentgrass, offering a balance of fine texture and easier maintenance.
- 🌱 In the UK and Europe, colonial bentgrass is extensively used on golf courses and is often called 'Browntop' after its common cultivar name.
- 🌱 Unlike creeping bentgrass, colonial bentgrass reproduces primarily through tillers rather than stolons, making it less prone to thatch buildup and easier to manage.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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