Old Cobblers Farm™ Navy Kentucky Bluegrass

Navy Kentucky Bluegrass (Poa pratensis) is a premium cool-season grass renowned for its lush, dense, vibrant green turf. Ideal for lawns, parks, and sports fields, it offers excellent cold tolerance, disease resistance, and wear recovery due to its rhizomatous growth. Perfect for northern climates, it creates a uniform, carpet-like lawn with minimal maintenance when properly managed.

Seed Type & Composition

• Seed Type: Cool-season, perennial turfgrass.

• Key Features:

  • Dense, fine-textured turf with rich green color.

  • Excellent cold tolerance and moderate drought resistance.

  • Rhizomatous growth for self-repair and durability.

  • High disease and pest resistance.

• Label Information (varies by supplier):

  • Purity %: Typically >90% Kentucky Bluegrass seeds.

  • Germination Rate %: Often >85% under optimal conditions.

  • Weed Seed %: Low, ideally <0.5%.

  • Other Crop Seed %: Minimal, typically <0.5%.

  • Inert Matter %: Low, often <2% (e.g., chaff, soil).

  • Lot Number: For batch tracking.

  • Origin: Region of seed production (e.g., U.S. Northwest).

  • Test Date: Recent germination/purity test date.

  • Net Weight: Package weight.

  • Manufacturer: Contact details.

Geographic & USDA Zone Suitability

• Geographic Areas: Northern U.S. (Northeast, Midwest, Pacific Northwest), southern Canada, and similar temperate regions globally.

• USDA Zones: 3–7; thrives in cool climates with cold winters and moderate summers.

• Sunlight: Full sun preferred (6–8 hours daily); tolerates partial shade with reduced vigor.

Soil Compatibility

• Soil Texture:

  • Loam: Ideal for balanced drainage, fertility, and moisture retention.

  • Clay: Tolerable with amendments for drainage (e.g., organic matter).

  • Sandy: Suitable with irrigation and organic matter for moisture retention.

• pH Range: 6.0–7.0 (slightly acidic to neutral); adjust with lime or sulfur if needed.

• Drainage: Good drainage essential; sensitive to prolonged waterlogging.

Watering & Drought Requirements

• Establishment Phase: Light, frequent watering (1–2 times daily) to keep soil moist; avoid waterlogging.

• Post-Establishment: Deep, infrequent watering; ~1–1.5 inches/week (including rainfall).

• Drought Tolerance: Moderate; goes dormant during prolonged dry spells but recovers with moisture.

• Tips: Water early morning; use mulch or tall mowing heights to reduce evaporation.

Germination & Growth Pattern

• Germination Time: 14–30 days at soil temperatures of 60°F–75°F (15°C–24°C).

• Growth Pattern:

  • Slow establishment due to long germination period.

  • Rhizomatous spread creates dense, uniform turf.

  • Vigorous growth in spring/fall; slows in hot summers.

  • Mature height: 2.5–3.5 inches mowed; 12–24 inches unmowed.

  • Ideal for lawns, parks, and moderate-use sports fields.

Mowing & Maintenance

• Mowing:

  • Height: 2.5–3.5 inches; avoid cutting more than one-third at a time.

  • Frequency: Weekly during spring/fall; less in summer.

  • Equipment: Use sharp blades to prevent tearing.

• Maintenance:

  • Watering: ~1–1.5 inches/week; adjust for rainfall.

  • Fertilization: Balanced fertilizer (nitrogen, phosphorus, potassium) in spring/fall; follow soil test recommendations.

  • Aeration: Annually in fall to reduce compaction.

  • Weed Control: Dense turf suppresses weeds; use selective herbicides if needed.

  • Pest/Disease: Monitor for leaf spot, dollar spot, grubs; use integrated pest management.

  • Thatch: Dethatch if >0.5 inches to maintain health.