Kentucky Bluegrass care — light, water, toxicity and hardiness
Kentucky Bluegrass (Poa pratensis) wants full sun and a drink about every 3 days once established. It is hardy in USDA zones 3 to 7. It is safe to have around pets.
| scientific name | Poa pratensis |
|---|---|
| family | Poaceae |
| category | grass |
| plant type | perennial |
| light | full sun |
| water cadence days | 3 |
| min zone | 3 |
| max zone | 7 |
| frost tolerant | true |
| toxic to pets | false |
| edible | false |
How often should I water Kentucky Bluegrass?
Water deeply about 2-3 cm per week; deep roots beat frequent sips.
Who eats it
Palatable to browsing animals such as deer: high. Palatable to grazing animals: high. Palatable to people: no.
What it needs
Its shade tolerance is medium. Its moisture use is medium. Its drought tolerance is medium. It wants at least about 30 inches of rain a year. Above roughly 65 inches of annual rain it struggles. It tolerates soil down to pH 5.8. It tolerates soil up to pH 8.4. Its fertility requirement is medium. Adapted to coarse, sandy soils: yes. Adapted to medium, loamy soils: yes. Adapted to fine, clay soils: yes. Its tolerance of waterlogging is low. It needs at least 90 frost-free days. Its salt tolerance is low. Its tolerance of chalky soil is low. Its fire tolerance is medium. Fire resistant: no. It has been recorded down to -43°F. It suppresses neighbours chemically: no.
How it grows
It grows as a rhizomatous form. Its growth rate is slow. Its lifespan is moderate. It puts on most of its growth in spring, summer, fall. It spreads by seed at a slow rate. It spreads vegetatively at a rapid rate. It resprouts after damage: no. Coppices: no. Its tolerance of hedging is low. At maturity it reaches about 2.0 feet. Its roots go down at least 10 inches. Its shape is erect. It holds its leaves through winter: no.
What it looks like
It blooms in mid spring. The flowers are yellow. Conspicuous in flower: no. The foliage is green. The foliage texture is medium. In summer the canopy is porous in porosity. In winter it is porous in porosity. Fall colour: no. The fruit or seed is brown. Fruit begins in spring. Fruit finishes by summer. It fruits high. The fruit persists on the plant: no. The fruit is conspicuous: no.
Growing more of it
Propagated by seed: yes. Propagated by cuttings: no. Propagated by container: no. Propagated by bare root: no. Propagated by bulb: no. Propagated by corm: no. Propagated by tubers: no. Cold stratification required: no. Seedling vigour is low. Commercial availability: routinely available.
Source: USDA PLANTS Database; US Cooperative Extension horticulture publications · ASPCA Toxic and Non-Toxic Plant List · 2026-09-02