Is Your Mom's Lawn Service Overtreating? Evaluating Annual Aeration, Insecticides & More

An Ontario, Canada (Zone 5) resident questions whether their mother's lawn company is overselling: annual aeration, curative crabgrass treatment (not preventer), and insecticide every year on an already-great lawn.

Balanced assessment:

• Aeration: Beneficial, but every 2–3 years is usually sufficient unless soil is heavily compacted. Annual is overkill for most established lawns.
• Crabgrass: Preventative (pre-emergent) is standard. Curative (post-emergent) only makes sense if the lawn is thick enough to suppress most germination naturally—and the company spots-treats escapes. If they're blanket-spraying curative, that's questionable.
• Insecticide: Only justified for *preventative* grub control in high-risk areas. Blanket insecticide for other pests is rarely needed and harms beneficials.

The company's perspective: They're managing risk. One missed grub outbreak = dead lawn = lost reputation + costly renovation. "Insurance applications" protect *their* business model.

Your move:

1. Ask for a customized program: "Can we skip preventative insecticide and monitor instead?"
2. Request aeration every 2 years unless compaction is documented
3. Get bids from 2–3 other companies for comparison
4. Accept that reducing services *may* slightly reduce perfection—but save $$

Great lawn + informed client = best long-term outcome.