Lawn · Framingham, MA
Grass seed for Massachusetts lawns: the 3 grasses UMass mixes are built on
The right seed matters as much as the timing. UMass Extension's lawn mixes are built on three cool-season grasses.
The short answer
- UMass lawn mixes are built on Kentucky bluegrass, perennial ryegrass and fine fescue.
- Renovation does well from August 15 to September 15. Early fall first, spring second.
- Water lightly and often: two or three times a day can be needed to keep seed damp.
Three grasses, three jobs in a lawn mix
- Kentucky bluegrass: the main grass in sunny lawn mixes.
- Perennial ryegrass: 10 to 20 percent of many mixes, and the fastest to establish.
- Fine fescue: the base of low-maintenance and dry-shade mixes.
The tall fescue surprise in the UMass guide
UMass lists tall fescue for athletic fields in the southern half of New England, not in its home lawn mixes. Wet shade gets its own mix built on rough bluegrass.
Timing and watering for new seed
UMass puts the strongest renovation window at August 15 to September 15. Early fall planting comes first, spring second; avoid early summer and summer.
Water lightly and frequently. Two or three times a day may be needed to keep the seed bed damp until it establishes, usually three to four weeks.
Seed rate for a sunny lawn mix is 3 to 4 pounds per 1,000 square feet, per UMass.
Sources
- UMass Extension, Lawn renovation: overseeding, read October 31, 2026