New Sod Lawns in Westchester County and Putnam

Sod is a finished lawn the day it goes down. It is grown on a farm, cut with about half an inch of soil attached, and laid over prepared ground. On a slope it holds soil immediately, which matters on the graded banks and cut driveways all over northern Westchester, where a bare seedbed can wash into the street in one hard summer storm. It is also the practical choice when kids and dogs use the yard and you cannot rope it off for two months.

Seed costs materially less and opens up grass types no sod farm around here grows in quantity. The trade is time and risk. Seed needs a long establishment window, weeks of light frequent watering, and it competes with every crabgrass and broadleaf seed already in your soil. On anything steeper than a gentle pitch, seed and loose topsoil move downhill before roots catch.

A flat back yard in early September with no deadline is a seeding job, and we will say so. A front bank that has been washing for two years is a sod job, and seeding it again is money spent twice.

Most failed sod jobs were lost before the sod arrived on the truck. Good sod over bad ground buys you a green lawn for about six weeks, and then the seams open and it goes off color in patches. We strip the old lawn rather than till it under, because tilling weeds and old thatch back into the profile plants them under your new grass.

Sod goes down in a running bond, the way brick is laid, so no two end joints line up across the lawn. Continuous straight seams telegraph through a finished lawn and are the first place drought shows. Joints are butted tight, never overlapped or stretched, because sod shrinks as it dries and stretched pieces leave gaps within a week.

On a slope we run the rows across the fall line rather than down it, and stake the pieces on anything steep enough to creep. The whole lawn is rolled once it is down. Rolling presses the roots into contact with the soil below, and without that contact they sit in an air gap and dry out no matter how much water you put on.

We will be direct, because this is the part most contractors leave vague. Once we drive away, watering is the single biggest determinant of whether the lawn takes. We can do everything else right and still lose it to one dry week.

New sod needs the soil under it kept consistently damp, not soaked and not allowed to dry, for the first ten to fourteen days. That means water every day, and twice a day in real heat. Lift a corner in a few places to check. If the soil underneath is dry, you are behind. After two weeks, shift to fewer and longer waterings, which is what pulls roots down instead of keeping them shallow.

First mow is usually two to three weeks in. Tug a corner, and if it holds rather than lifts, it is rooted enough to cut. Set the blade high and take no more than a third of the blade height. Full root-in runs about four to six weeks. Keep heavy traffic and furniture off it for the first month while the ground is still soft.