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Reference

Numbers, not opinions

Three tables generated directly from the catalogue: how far apart to plant for true seed, how long each crop takes to harvest, and how long it takes to come up. Free to cite.

Isolation distances

How far apart varieties must be for true seed, across 14 crops, with pollination type and seed life.

Days to harvest

Fastest, median and slowest days to harvest per crop, from 891 varieties.

Germination times

How long each crop takes to come up, and when to give up on a tray.

Browse all 891 varieties →  ·  Seed saving guides  ·  Grow notes

One email when there is something worth reading

New varieties, seed-saving notes, and corrections to the reference tables. No sales, no fixed schedule.

DarkGrowSeed Bank

Open-pollinated and heirloom vegetable seed with published isolation distances, germination figures and planting calendars.

Variety data from Wind River Greens Plant Database (CC BY 4.0) · Dirven Market Maker LLC, Wyoming, USA · Wyoming SOS No. 2026-002057189

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