🌿

FertilizerPro

Turf & Lawn Nutrition for Homeowners

Search for your address, zoom in, then click Start Tracing Yard to draw your lawn boundary.

Find the N-P-K numbers, bag weight, and coverage rate on your fertilizer bag and enter them below.

Fertilizer calculator

Trace your yard on the map above to get started.

Bag weight (lbs)

N-P-K analysis (% on bag label — N required, P & K optional)

N — Nitrogen

P — Phosphorus

K — Potassium

Spreader type

Enter your soil test results to get a tailored fertilizer plan and seasonal application schedule.

Soil test interpreter

Enter your soil test results to receive a tailored fertilizer plan, amendment recommendations, and a seasonal application schedule.Basic mode shows common fields. Switch to Advanced to enter Buffer pH, CEC, Ca/Mg/S, and lab details.

A — Lawn Context

Grass Type *

Lawn Size (sq ft) *

Quality Goal

Lawn Age / Condition

ZIP Code

Climate Zone

State (for P regulations)

C — Core Soil Chemistry

pH and organic matter are required

Soil pH *

Organic Matter (%)*

D — Macronutrients

Enter a numeric value or select a category label — whichever your report provides

Phosphorus (P)

Potassium (K)