Introducing UNDER SOD™: The Fertilizer Made to Go Beneath New Sod

For years, as CT Sod grew and delivered sod across the Northeast, our customers kept asking the same question: "What fertilizer do I use for new sod?" There was never a clean answer. Homeowners didn't know what to buy, the pros had their own habits, and the few who found something often had no idea how much to apply — or whether it would burn the sod they'd just paid for.

Now there is an answer. Introducing UNDER SOD™ — the biological starter fertilizer made to go *beneath* new sod. It is produced by Under Sod Brands LLC and distributed through CT Sod and select regional partners, and it launches across the Northeast in Fall 2026.

Why it exists

Most bags on the garden-center shelf are labeled "for seed and sod" — but seed and sod are not the same problem. Seed starts from bare ground and has to build roots from scratch. Sod arrives with a mature root system already grown on the farm; its job in the first few weeks is to *bridge* those roots down into your soil. That contact zone — the few inches of earth directly under the turf — is exactly where most starter products were never designed to work. UNDER SOD™ is built for it.

What it is

UNDER SOD™ is a biological 4-2-5 starter fertilizer — a moderate, low-phosphorus, potassium-forward nutrient charge plus the living soil biology young roots actually use. The biology is the product; the nutrients are just the carrier. Full label details and specs are on the UNDER SOD™ product page.

It is applied to the prepared, graded soil and raked into the top 2–4 inches *before* the sod is laid, so freshly cut roots make immediate contact with nutrients and biology on day one. There is no burn risk when used as directed.

Dead-simple to apply

No measuring, no math: one 25-lb bag covers a 500 sq ft pallet of sod. Ordering four pallets? Use four bags. That is the whole calculation.

Who it is for

UNDER SOD™ is for anyone laying fresh sod:

• Homeowners putting in a new lawn — join the notify list.
• Landscapers & installers who want one product they can confidently recommend on every job — become a partner.
• Sod farms, garden centers & distributors — carry UNDER SOD™.

When can you get it?

UNDER SOD™ launches across the Northeast — CT, MA, NY, NJ, RI, NH, VT, ME, and PA — in Fall 2026. It is not for sale yet, but you can be first to know when it is: get notified at sodfertilizer.com.

In the meantime, if you are planning a sod project, read our honest comparison of the best fertilizer to put under new sod, and order fresh-cut sod from CT Sod whenever you are ready.