
Along the Nissequogue
Hydroseeding in Smithtown, NY
A North Shore town whose spring-fed river runs to the Sound, and more than half of whose area is water.
- No-charge site visit and a written quote before any work
- Quotes split prep, seed mix, mulch and erosion items line by line
- Grass blend picked for the light and soil on your lot
Protecting a Spring-Fed River While the Grass Grows
Hydroseeding in Smithtown is shaped by the Nissequogue River. The river runs 8.3 miles from Smithtown into Long Island Sound, and like every freshwater river on the island it is fed entirely by groundwater, not by lakes. It carries more water than any other freshwater river on Long Island. Yards, ballfields and building sites across the town drain toward it.
Ponds, parks and a tidal mouth
The river rises near Hauppauge, flows into Blydenburgh Park Pond, picks up tributaries in Caleb Smith State Park Preserve, and becomes a tidal estuary at Route 25 before reaching the Sound at Kings Park. Sediment from a bare lot near any of those reaches settles in ponds and marsh. That is why we put silt fence and inlet protection in early on Smithtown jobs, and why we stabilize bare soil quickly with hydromulch.
A town that is more than half water
Of Smithtown's 111.5 square miles, 57.7 are water. Shoreline and riverside lots often slope toward the water, and on those we finish with a bonded fiber matrix or a stapled blanket instead of plain mulch.
Lawns in the hamlets
Commack, Hauppauge, Kings Park, Nesconset, St. James and the other hamlets are full of established lawns. Our most common residential work is lawn renovation and overseeding: thin turf brought back with aeration, topsoil and a hydroseed pass, or a new lawn installation after a renovation project.
On the calendar
Seed in late summer or early fall when you can. Spring seeding works, but crabgrass and early heat compete with young grass.
Get a free estimate If you would rather talk first, call (929) 207-2848 and we will book a time to look at the yard.
Smithtown Water and Land
- Nissequogue River. The Nissequogue is an 8.3-mile river flowing from Smithtown into Long Island Sound, fed entirely by groundwater.
- Highest flow. Its average discharge of 42.2 cubic feet per second is the most of any freshwater river on Long Island.
- Estuary. The river becomes an estuary at Route 25 and reaches the Sound at Nissequogue River State Park in Kings Park.
- Water share. Smithtown has 111.5 square miles of total area, of which 57.7 square miles, or 51.75 percent, is water.

Smithtown Questions
I live near the river. Do I need special erosion control?
Riverside lots should have silt fence on the water side while soil is bare, and the bare area should be covered with mulch or a blanket right after seeding.
Why do you care about the ponds downstream?
Blydenburgh Pond and the tidal marsh trap whatever soil washes in. Keeping sediment on site protects them and avoids trouble with the town.
Can you seed a slope that runs down to the water?
Yes. We use a blanket or a bonded fiber matrix on banks so the seed holds its place while the roots get established.
Do you work in Commack and Hauppauge?
Yes, including the parts of those hamlets inside Smithtown and the neighboring towns.
How long before I can mow new hydroseed?
Usually three to four weeks, once most of the grass is about three inches tall.
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