Lawn Care · April 2026 · 5 min read
That starter fertilizer at the box store may be illegal to spread on your lawn.
Massachusetts regulates lawn fertilizer more tightly than most states, and living in the Neponset and Charles watersheds is the reason. Phosphorus running off lawns feeds algae in the rivers and ponds people around here fish and paddle.
None of this makes a good lawn harder to grow. It just means the bag you grab matters.
Phosphorus fertilizer is allowed on established turf only when a soil test shows a deficiency, or when you are establishing new grass. Most Norfolk County lawns already test adequate, which is why our standard applications carry a middle number of zero.
Applications are prohibited in the frozen and dormant stretch of the year. A December feeding is not a secret trick, it is a violation, and the product mostly washes off anyway.
Granules on a driveway or sidewalk go straight to a storm drain in the next rain. Blowing walks clean after a spread is part of the job, not a courtesy.
Properties along Hawes Brook, the Neponset, Charles or any wetland edge get a no-application buffer strip. Several of our Westwood and Medfield lots back onto conservation land, and we treat those edges as off limits.
Five visits, spring through late October, nitrogen and potassium with slow release, phosphorus only where a soil test or new seeding justifies it, plus crabgrass and broadleaf control timed to soil temperature instead of the calendar.
If you have been buying your own bags and are not sure what you are spreading, send us a photo of the label. We will read the three numbers and tell you whether it belongs on your lawn.
