When to seed Kentucky bluegrass in Indiana?
By LawnYear editorial team · Published · Updated Windows are read from the extension publications listed under Sources; the dates are approximate.
The answer
Seed Kentucky bluegrass in Indiana from Aug 15 to Sep 15, per Purdue University Cooperative Extension Service (1998). Reseed thin or bare areas starting in the middle of August; the optimum seeding window is August 15 to September 15 in central Indiana. AY-27 describes lawns of cool-season grasses; maintenance levels (high, medium, low) are the publication's own.
Full calendar: Indiana lawn care calendar · Kentucky bluegrass in other states · Lawn schedule by ZIP
Approximate dates for your state. Check with your local cooperative extension office before you act.
All Indiana windows for Kentucky bluegrass
The Indiana calendar on this site lists seeding Aug 15 to Sep 15, fertilizing May 1 to May 31, Sep 1 to Sep 30 and Nov 1 to Nov 30, weed control Apr 1 to Apr 30 and Oct 1 to Oct 31, mowing Apr 1 to Nov 30 at 2.5 to 3.5 in and watering Jun 1 to Aug 31 for Kentucky bluegrass.
Where the dates come from
Purdue University Cooperative Extension Service: AY-27, Maintenance Calendar for Indiana Lawns (1998); month-by-month calendar for cool-season grasses at high, medium and low maintenance levels. Read on 2026-10-30.
What to check for Indiana
The seeding dates for Kentucky bluegrass above (Aug 15 to Sep 15) apply to Indiana as a whole, so the north and south of the state are not told apart.
Other grasses in Indiana
For tall fescue, perennial ryegrass and fine fescue, the Indiana calendar gives Aug 15 to Sep 15 for seeding.
Seeding Kentucky bluegrass in other states
- Virginia: Aug 15 to Oct 15 and Mar 1 to May 31, per Virginia Cooperative Extension (Virginia Tech), 2025.
- Pennsylvania: Aug 15 to Oct 15, per Penn State Extension.
- Ohio: Sep 1 to Sep 15 and Mar 1 to Apr 30, per Ohio State University Extension, Lake County (2007).
- Missouri: Sep 1 to Sep 30, per University of Missouri (Integrated Pest Management), 2015.
- Kentucky: Aug 15 to Sep 30 and Feb 15 to Mar 15, per University of Kentucky Cooperative Extension Service (2016).
- Wisconsin: Aug 20 to Sep 10 and Apr 20 to May 10, per University of Wisconsin-Madison Division of Extension (2025).
- New Jersey: Aug 15 to Oct 10, per Rutgers Cooperative Extension (NJAES), 2004.