GlenCalc

Seeds needed calculator

Not every seed sprouts, and not every seedling survives. The packet usually gives a germination percentage.

Your answer

Seeds to sow32

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How we worked it out

Updated as you change the numbers.

  1. Seeds = plants wanted ÷ (germination × survival). For rows: row length × rows × seeds per foot.

Method and assumptions

Germination rates on packets are measured in ideal conditions; older seed and cool soil lower them.

Questions

How many seeds for 24 plants at 85% germination?

32 seeds, allowing 90% seedling survival.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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