Calculators
Free planting calculators
Four focused tools that turn your beds, dates, and crops into clear numbers — how much to plant, when to start, how to stagger, and when to expect results. Every result shows its math.
Plant Spacing Calculator
Enter your bed size and spacing to get plant counts, seeds to start with a germination buffer, and how many plug trays you'll need.
Open calculatorSeed Starting Calculator
Work back from your last frost or transplant date to know exactly when to start seeds indoors, move plants out, or direct sow.
Open calculatorSuccession Planting Calculator
Plan repeat plantings at a steady interval and flag any round that runs out of season before first fall frost.
Open calculatorBloom & Harvest Date Calculator
Estimate when to expect first bloom, harvest, or maturity from a planting date and the crop's days to maturity.
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