What the trucks spray
A six-round program on a 5,000 sq ft collar-county lawn runs $240 to $390 a year before mowing. Here is every round, the chemistry on the truck, and what this site does instead.
Round 1: spring pre-emergent plus fertilizer
Persists in soil for months, toxic to fish and aquatic invertebrates via runoff, and it blocks grass seed as well as crabgrass seed so you cannot repair thin spots in spring.
Corn gluten meal at 20 lb per 1,000 sq ft when forsythia blooms. Feeds 9 percent nitrogen while it suppresses crabgrass germination.
Straight talk: Expect 50 to 60 percent control year one and better each year as the lawn thickens. The lawn mowed at 3 inches does more than either product.
Rounds 2 and 4: broadleaf weed control blanket spray
Dicamba volatilizes and drifts onto vegetables and trees. 2,4-D is classed as a probable carcinogen by IARC. Blanket spraying the whole lawn for a dozen dandelions is the definition of overkill.
Pull dandelions and plantain with a stand-up weeder. Spot-spray clover, creeping Charlie, and violets with iron HEDTA. Repeat in three weeks. Never spray the whole lawn.
Straight talk: Iron matches the three-way on dandelions, clover, plantain, and chickweed. On creeping Charlie and violets it suppresses rather than eliminates; so does the truck, which is why they keep coming back every year.
Round 3: summer fertilizer, often with grub control
Feeding cool-season grass in July pushes soft growth that burns and invites fungus. Imidacloprid is a neonicotinoid with well-documented harm to bees. Chlorantraniliprole is milder but persistent.
No summer feeding at all. Apply beneficial nematodes in late June for this year's grubs and milky spore once for the next ten years of Japanese beetle grubs.
Straight talk: Nematodes need moist soil and evening application to work. Milky spore takes two to three seasons to build up. Most collar-county lawns do not need grub control every year anyway; the trucks sell it on fear.
Rounds 5 and 6: fall and winterizer fertilizer
Fast nitrogen in fall is not harmful so much as wasteful: a third of it leaches before the roots use it. The timing is right; the product is the problem.
Milorganite at the bag rate on Labor Day and again at Halloween. Slow release means the root system takes all of it.
Straight talk: This is the one round where the trucks and the eco plan agree on timing. Fall feeding is the most important thing anyone does to a lawn.
Core aeration and overseeding add-on
Nothing wrong with it except price and the seed quality. You can rent the same machine for $75 to $90 a half day and choose an elite seed blend for your grass type.
Rent a core aerator with a neighbor, two passes, then overseed with the blend matched to your grass and an organic starter fertilizer.
Straight talk: Hard physical work for 90 minutes. Worth every minute.
Weekly mowing service
Crews mow on their schedule, not the grass's, usually at 2.5 inches or lower because it looks tidy and saves them a return trip. Short mowing is the number one cause of weeds. The $1,100 to $1,500 a year is the biggest line in the whole budget.
Mow it yourself at 3 inches, weekly, with a sharp blade, and leave the clippings.
Straight talk: Forty minutes a week. This site exists because of this line.
Illinois restricts phosphorus in lawn fertilizer except when establishing new grass or when a soil test shows a deficiency, which is why the plan uses a starter fertilizer only at overseeding time. Several collar-county villages also limit pesticide use near waterways and on parkways. Whatever you put down, read the label and keep it off the sidewalk, where the next rain carries it to the storm drain.