Seeds & spacing.
Measured clearly.
Plant counts, germination checks, seed quantities and calendar tools for sowing plans.
Turn a physical garden into checkable quantities.
Seed packets give spacing, germination and timing guidance, but turning those numbers into a bed plan still takes arithmetic. This library makes the assumptions explicit and produces counts or dates you can transfer to a garden notebook.
Choose a calculator
5 focused tools
Plant spacing
Estimate how many evenly spaced plants fit in a rectangular garden bed.
Square-foot garden
Calculate plant count using square-foot gardening densities.
Seed quantity
Estimate seeds to sow from target plants, germination rate and transplant survival.
Germination rate
Calculate germination percentage and an adjusted sowing multiplier from a seed test.
Seed starting date
Find an indoor seed-starting date by counting weeks before your last frost date.
A practical sequence
- Choose the crop and mature spacing.
- Measure only the planted area.
- Adjust for germination and expected survival.
- Check dates against local frost probability and the packet.
Common planning mistakes
- Using seedling size instead of mature spacing.
- Assuming every seed will germinate.
- Starting all crops indoors.
- Treating an average frost date as a guarantee.
Seeds & spacing FAQ
How accurate are planting calculators?
They accurately apply the inputs, but variety, weather, soil and management still affect the real stand.
Where should spacing guidance come from?
Start with the seed packet or breeder, then use local extension guidance for your climate and growing method.