When does pre-emergent application typically open in East Saint Louis, IL?

Pre-emergent application typically opens in April to May for East Saint Louis, IL, when 2-inch soil temperature reaches the 50–55°F threshold for several consecutive days. Apply earlier than that and the herbicide degrades before crabgrass germinates; apply later and weeds have already sprouted. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

What grass types grow best in East Saint Louis, IL?

East Saint Louis, IL is a transition zone where both cool-season and warm-season grasses are common. Cool-season grasses (tall fescue, Kentucky bluegrass, perennial ryegrass, fine fescue) thrive when 2-inch soil sits in the 50–65°F range and slow down in midsummer heat. Picking a grass family that matches the climate is the single biggest lawn-care decision; transition-zone homeowners often maintain blends and accept that neither family will look perfect year-round. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

When is the first fall frost typically expected in East Saint Louis, IL?

In East Saint Louis, IL, the first fall frost typically arrives around October 26. Soil temperature continues to drop through October and November, which closes the fall fertilizer window for warm-season grasses and opens the dormant-seeding window for cool-season grasses. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

How often is this schedule updated?

Recommendations recompute every 6 hours from the latest reading at Shaw Nature Reserve, about 38 miles from East Saint Louis. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

What soil temperature do cool-season grasses need to germinate?

Cool-season grasses like fescue, Kentucky bluegrass, and perennial ryegrass germinate best when 2-inch soil temperature sits in the 50–65°F range for several consecutive days. Above that, summer heat stresses young seedlings; below that, germination slows or stalls. The re-entry interval (REI) on any post-emergent products you apply during establishment is on the product label; respect it before letting pets or children back on treated areas. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

Where does the soil temperature data for East Saint Louis come from?

Soil temperature for East Saint Louis comes from Shaw Nature Reserve, a station in the USDA Soil Climate Analysis Network (SCAN) located about 38 miles away. Daily readings at depths from 2 inches down to 40 inches feed the schedule's window-open and window-closing decisions. This is informational guidance only, not a prescription. The label is the law. Consult your local Cooperative Extension office before applying any product.

Lawn Care Schedule for East Saint Louis, IL

See another city's schedule →

Right now in East Saint Louis

77°F at 2-inch depth · Measured in the ground · Shaw Nature Reserve (USDA SCAN #2227), 38 mi W · read 3 days ago (Sep 10, 2026) · updates nightly with about a 1-day sensor lag

Loading lawn care schedule

Lawn Care Schedule for East Saint Louis, IL

Right now in East Saint Louis

Lawn Care Schedule for East Saint Louis, IL

Right now in East Saint Louis

September

October

November

December

About this schedule

Sources

Cool-season late-fall (winterizer) nitrogen