Free garden tools, built on real data
Plan planting, order the right amount of material and skip the guesswork. Every tool here is free, works on your phone and uses public data from NOAA, the USDA and university extension services.
Data tools
Frost Dates by ZIP CodeNew
Median and safer 10%-risk frost dates and frost-free days from the nearest of 7,247 NOAA stations.
Open tool →Frost Dates by State
Town-by-town last and first frost tables for every state, with how elevation shifts the dates.
Open tool →Free Frost Date Dataset
Download every station's frost dates as CSV for your blog, class or research. Free with attribution.
Open tool →Embed the Frost Date Tool
Add the ZIP-code frost lookup to your own garden club or nursery website in one line.
Open tool →Garden calculators
Planting Calendar by ZIP
Start-indoors, transplant and sowing dates for 30 vegetables and herbs, built from your frost dates.
Open tool →Mulch Calculator
Cubic yards, bags and cost for any bed shape, with depth guidance by mulch type.
Open tool →Soil Calculator
Soil for raised beds and borders in cubic feet, yards and bags.
Open tool →Topsoil & Gravel Calculator
Tons and yards of topsoil, gravel and sand for paths, bases and fills.
Open tool →Lawn Fertilizer Calculator
Pounds of product per 1,000 sq ft from the NPK numbers on the bag.
Open tool →Paver & Patio Calculator
Pavers, base gravel and sand for a patio or walkway.
Open tool →Why trust these tools?
Each tool shows its source and method. Frost dates come straight from NOAA's 1991–2020 climate normals; calculators use standard volume formulas and coverage rates checked against university extension publications. Nothing here needs an account, and the tools don't track what you type. Read the methodology.