Horticultural Planning Tools
Home growing, treated as the discipline it is — every date computed against your local frost record, not a national average. Sixteen interlocking tools and a verified database of hundreds of crops, from sowing schedules to soil math.
Plan exactly when to re-sow crops for continuous harvest all season long.
Calculate when to start seeds indoors based on your last frost date.
See exactly what to plant, start indoors, or harvest right now for your ZIP code.
Look up your last spring frost, first fall frost, and USDA hardiness zone.
Per-crop growing guides drawn from the verified crop database.
A verified database of vegetables, herbs, fruits, and flowers — broader than the 100–250 most tools stop at. Each one is checked against university extension publications, Johnny's Selected Seeds charts, USDA, or NOAA before it ships; every guide lists its sources.
Frost dates come from NOAA's 1991–2020 Climate Normals — the current 30-year baseline — reported at three probability bands per station. Hardiness zones come from the USDA 2023 Plant Hardiness Zone Map.
See start-indoors, transplant, and direct-sow dates for your specific location.
Design your garden bed visually with spacing, companion warnings, and printable plans.
Plan your square-foot garden with optimal plants-per-square from the crop database.
Calculate how many plants fit in your garden area using in-row and between-row spacing.
Calculate how much soil you need for raised beds in cubic feet, yards, and bags.
Calculate quantities of each component to blend your target soil mix.
Calculate how much mulch you need by area and desired depth.
Balance your compost pile's carbon-to-nitrogen ratio for faster breakdown.
Calculate how much fertilizer to apply based on area, target rate, and product NPK.
Check which plants grow well together and which combinations to avoid.
Plan crop rotation across beds and seasons to reduce disease and improve soil.