Chicago Ohare International Airport lawn care, month by month
| Month | Tasks |
|---|---|
| January | Dormant — keep leaves cleared, stay off frozen turf |
| February | Dormant — keep leaves cleared, stay off frozen turf |
| March | Apply crabgrass pre-emergent |
| April | Apply crabgrass pre-emergent · Light feeding after green-up |
| May | Light feeding after green-up |
| June | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat |
| July | Mow high (3–3.5″); water deeply in dry spells; no feeding in heat |
| August | Aerate + overseed |
| September | Aerate + overseed · Main fall feeding · Winterizer feeding |
| October | Winterizer feeding · Final mow of the year |
| November | Final mow of the year |
| December | Dormant — keep leaves cleared, stay off frozen turf |
Reading the Chicago Ohare International Airport lawn year
Chicago Ohare International Airport runs on the classic northern rhythm: a short, important spring (pre-emergent before soil hits 55°F, one light feeding), a defensive summer (mow tall, water deep, feed nothing), and then the season that actually builds a lawn — early fall, when aeration, overseeding around Aug 29 – Sep 13, and the year's main feeding all land before the Oct 28 frost closes the year.
Grasses that fit Chicago Ohare International Airport
Frequently asked questions
When should I overseed my lawn in Chicago Ohare International Airport?
For cool-season grass (bluegrass, fescue, ryegrass), overseed in early fall — in Chicago Ohare International Airport that means roughly Aug 29 – Sep 13, timed 45–60 days before the average first fall frost (Oct 28) so seedlings establish before cold. Spring works as a backup but collides with crabgrass season.
When do I put down crabgrass preventer in Chicago Ohare International Airport?
Aim for Mar 26 – Apr 16 — the estimated stretch when Chicago Ohare International Airport soil approaches the ~55°F germination threshold, anchored to the average last frost (Apr 16). It's an estimate: a soil thermometer reading 50–55°F at 2″ depth for several days is the precise trigger, and pre-emergent must go down before crabgrass sprouts, not after.
When should I stop mowing in Chicago Ohare International Airport?
Keep mowing as long as the grass grows — in Chicago Ohare International Airport that's typically until Oct 21 – Nov 11, around the average first fall frost (Oct 28). Take the final cut slightly shorter to discourage snow mold.
What grass grows best in Chicago Ohare International Airport?
Illinois is cool-season country: Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue. See the grass guides linked below for identification and care.