Know when to plant, and how much.
Free calculators for US home gardeners. Put in your frost date or your bed size and get dates and amounts you can act on.
An example season with an April 20 last frost.
Calculators
- Frost Dates by ZIP Code
Your average last spring and first fall frost, and how long your growing season is.
- Seed Starting Calculator
When to sow seeds indoors and when to move transplants outside.
- Garden Planner by Family Size
How many plants of each crop to grow for your household.
- Raised Bed Soil Calculator
Cubic feet, bags and cost to fill your raised beds.
- Mulch Calculator
Cubic yards and bags of mulch for any bed size and depth.