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Aurora soils are different from the rest of DuPage. The east side of the city sits on heavy clay carried down by the Fox River; the west side has sandier loam left by the same glaciers that carved the rest of the county. A lawn-care calendar that works in Naperville will under-fertilize the east-side Aurora yard and over-water the west.
This is the calendar we run on our own Aurora properties, adjusted for the soil under your feet.
March: the soil-temp watch
Don't do anything to the lawn until the soil hits 40°F at 4 inches depth. In Aurora, that lands somewhere between March 15 and March 30 most years — but watch the soil, not the calendar.
A $12 soil-temp probe from any garden store does the work. Stick it 4 inches in, leave it 5 minutes, read the dial. Below 40°F, nothing in the soil is awake yet — fertilizer will wash off, seeds won't germinate, weed treatments will hit healthy roots and stress them.
What to do in March
- Walk the lawn. Note bare patches, low spots that hold water, and any vole tunnels left from winter.
- Pick up debris. Sticks and leaves matt the lawn and slow the spring greenup. Rake gently — don't dethatch yet.
- Sharpen the mower blade. A dull blade tears grass instead of cutting it; the torn edges turn brown for 4–5 days after each cut.
April: pre-emergent and the first cut
Related service
Lawn Care
Mowing, edging, fertilization, and weed control on a weekly schedule. Same crew, same day, every week — April through November.
See the service →Pre-emergent timing in Aurora is the single biggest lever in your spring program. Hit the window and crabgrass never germinates; miss it and you'll fight crabgrass into August.
The window: soil temp 50–55°F sustained for 5+ days. In Aurora, that lands April 10–25 most years. Forsythia bushes in full bloom is the field signal — when forsythia is out, soil temp is at 55.
What to do in April
- Apply pre-emergent. Dimension or Barricade are the two products most DuPage programs use. Dimension is the broader-spectrum; Barricade is cheaper. Either works.
- First mow at 3.0 inches. Don't lower the deck below 3.0; cool-season grasses need leaf area to wake up. Take 1/3 off the top, no more.
- Top-dress bare patches with seed. Use a Kentucky bluegrass / fescue blend (50/50). Press the seed in with the back of a rake; cover with straw.
- Don't fertilize yet. Roots aren't ready to take up nitrogen until the lawn is fully greened up.
[!tip] If you spread pre-emergent and overseed in the same week, the pre-emergent kills your seeds. Either pre-emergent in early April + seed in late September, or skip pre-emergent and seed in April. Pick one.
May: the first fertilizer round + irrigation startup
May is when the lawn gets serious. The grass is fully out, the roots are working, and the soil microbiome is active. Now nitrogen pays off.
What to do in May
- First granular fertilizer round. A 24-0-12 (NPK) bag at the rate of 0.7 lb of nitrogen per 1,000 sq ft. Spread with a broadcast spreader, water in within 24 hours.
- Irrigation system startup. Schedule the sprinkler turn-on. We charge $185 for a six-zone Aurora startup (test, head-tune, programming, leak check). Turn on too early and you waste water; turn on too late and the lawn enters water stress in the first warm week.
- Mow at 3.0 inches; mulch the clippings. Bagged clippings are a missed opportunity in May — the grass is full of the nitrogen the roots just took up.
- Spot-treat broadleaf weeds. Dandelions, clover, and creeping Charlie respond to a liquid 2,4-D + dicamba spot spray. Treat at 65–75°F; lower or higher and the herbicide doesn't work.
June: heat-prep and the second round
By June 1, the lawn is in heat-prep mode. Roots are deeper, the leaf is flexing for July's stress, and the program shifts.
What to do in June
- Second fertilizer round. Same bag as May; same rate. This is the round that funds July's color.
- Raise the mowing height to 3.5 inches. Taller grass shades the soil, slows evaporation, and reduces weed germination. We raise the deck on every Aurora lawn at the first June visit.
- Audit the irrigation. Walk every zone, watch for misting, broken heads, dry spots. Irrigation systems drift between zones over the season; fixing in June saves the lawn in August.
- Apply a second pre-emergent if your spring rounds were spotty. A "split application" pre-emergent in June extends the crabgrass barrier through August. Optional — most lawns can skip if April was clean.
What this calendar costs in Aurora
Run yourself: $300–$500 in product (pre-emergent, fertilizer, seed, soil amendment) + 12–18 hours of your weekends across March–June.
Run by us: our 5-round residential lawn-care program for an Aurora half-acre lot is $580–$720 per season. Includes pre-emergent, four fertilizer rounds, spring soil test, and weed monitoring. We mow weekly at $48–$58 per visit ($1,000–$1,200 across the 22-week season).
Either path works. We've kept lawns of both kinds alive for 25 years; the difference is your weekends.
When timing matters more than effort
The Aurora homeowners who lose lawns in summer do so because they fertilized in mid-March (washed off), spread pre-emergent in early May (too late), or watered too lightly through June (shallow roots). Timing is the program. Effort is what fills it in.
If you want us to run the calendar for your property, book a free site walk and we'll tell you what your soil and shade situation actually needs.
