How to Grow KY 17 Bluegrass
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KY 17 Bluegrass
Poa pratensis 'KY 17'
grassKY 17 is a premium Kentucky bluegrass cultivar bred for superior turf quality, disease resistance, and fine texture. It is widely used in northern and transition zones for lawns, sports fields, and golf courses. This perennial cool-season grass establishes quickly and self-repairs through rhizomatous growth.
When should you plant KY 17 Bluegrass in your zone?
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Example KY 17 Bluegrass timeline · Pittsburgh, PA (Zone 6b)
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Plant KY 17 Bluegrass
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 KY 17 Bluegrass
Around May 1≈ 14 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact KY 17 Bluegrass dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-7, with excellent performance in northern and transition zones
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Germination
7-14 daysFine seedlings emerge with delicate leaf blades; root system begins developing
Keep soil consistently moist but not waterlogged. Protect from foot traffic. Maintain cool soil temperatures (60-70°F ideal). Avoid fertilizing until seedlings are established.
Seedling & Establishment
3-6 weeksYoung plants develop 2-3 true leaves and begin tilering; root system expands
Water regularly to maintain moist (not soggy) soil. Avoid heavy use or mowing until plants are 3+ inches tall. Light balanced fertilization can begin after 4-6 weeks.
Vegetative Growth
Ongoing throughout growing seasonGrass develops dense tillers and rhizomes; blade density increases; strong root system established
Begin regular mowing at 2.5-3.5 inches height. Apply moderate nitrogen fertilizer in spring and fall. Water based on rainfall; reduce frequency as roots deepen. Monitor for weeds and manage competitively.
Heading/Seed Production
4-6 weeks (May-June, depending on zone)Grass produces seed heads (inflorescences) in late spring to early summer; visible flowering culms emerge above the canopy
Mow regularly to remove seed heads and maintain turf quality (cutting at 3+ inches allows some heading). Nitrogen can encourage vegetative growth over seed production. Some seed heads are natural and indicate plant vigor.
Dormancy & Stress Recovery
Variable; summer dormancy possible in zones 7a-7b; winter dormancy in zones 3-6Grass slows growth in summer heat or winter cold; enters dormancy in extreme conditions; self-repairs through rhizomatous spread
In summer, water deeply and infrequently during drought. Reduce mowing frequency. In fall, apply slow-release fertilizer to support root development and spring green-up. Avoid heavy traffic on dormant turf.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Apply beneficial nematodes in soil; reduce thatch; maintain proper mowing height; use insecticidal soap if severe
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Increase irrigation to reduce stress; apply insecticidal soap or neem oil; encourage beneficial predators
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Use Bacillus thuringiensis (Bt); maintain adequate nitrogen; inspect turf regularly for larvae
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Improve air circulation; reduce shade; apply sulfur fungicide; avoid excess nitrogen in low-light areas
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Increase mowing frequency; improve drainage; apply fungicide if severe; ensure adequate nitrogen fertilization
Uses
Premium lawn turf
HouseholdKY 17 is renowned for exceptional aesthetic quality, fine texture, and lush green color. It is the cultivar of choice for high-end residential lawns, golf courses, and sports fields across the northern United States. [source]
Self-repairing turf
HouseholdKY 17's rhizomatous growth habit allows it to naturally repair damage from foot traffic, wear, and minor injury without resowing. This makes it ideal for playgrounds, athletic fields, and high-traffic residential areas. [source]
Forage and cover for wildlife
WildlifeAs a perennial cool-season grass, KY 17 provides nutritious forage for grazing animals and ground cover for small mammals and ground-nesting birds. It improves habitat diversity when part of a naturalized landscape. [source]
Erosion control and soil stabilization
HouseholdKY 17's deep root system and dense canopy stabilize soil, reduce erosion on slopes, and improve water infiltration. It is often used in conservation landscaping and rain gardens. [source]
Disease resistance
HouseholdKY 17 exhibits strong resistance to leaf spot diseases, powdery mildew, and other fungal pathogens common to bluegrass. This reduces the need for fungicide applications and makes it a sustainable choice for eco-conscious homeowners. [source]
Harvest Tips
KY 17 is not harvested for yield but rather maintained through regular mowing. Mow at 2.5-3.5 inches height during growing season (every 5-7 days). Collect clippings only if thatch builds up; mulching clippings returns nutrients. For seed production, allow plants to head and dry naturally, then collect in late summer, but this is uncommon for home lawns.
Fun Facts
- 🌱 KY 17 was developed by the University of Kentucky and released in 1983; it has become one of the most widely used premium Kentucky bluegrass cultivars in North America due to its superior disease resistance and turf quality.
- 🌱 Kentucky bluegrass can survive winter by going dormant, then green-up remarkably fast in spring because it stores carbohydrates in its rhizomes (underground stems). KY 17 is particularly efficient at this seasonal transition.
- 🌱 KY 17 is sometimes called a 'self-healing' grass because damaged areas will fill in naturally through rhizomatous spread—a major advantage over bunch-type grasses like perennial ryegrass.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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