Sowing
Sow indoors in January, in plug trays, three seeds per plug. Plant the whole clump out as one — don't thin it. Top the plants to about 6 cm.
Month by month
January: sow indoors in plug trays, three seeds per plug.
February: start feeding with a weak nutrient solution.
March: pot the whole clumps on into 7 cm pots, keep feeding, top the plants to about 6 cm.
May–June: out into the beds. Harvest-thin the clumps as the season goes.
Tips & lessons learned
Growing onion from seed is fun, and plug trays make it easy — 3 seeds per plug, leave them until late February, then move the clumps to 7 cm pots.
Methods
From sets (planted direct, April)
The lazy route: plant sets directly outside in April, tips just showing, 10–15 cm apart. Water when needed.
My varieties
| Variety | Rating | Years grown |
|---|---|---|
| Rijnsburger Bajosta (Runåbergs 6030) | – | – |
From the log
Grows well with
Take it with you
The Yellow onion Guide
Coming soonEverything on this page and more, as a printable PDF: sowing to harvest, my varieties, the month-by-month schedule.
Join the letter — hear when it landsTurnip + Yellow onion (from seed) — complete bed recipe
Full guide with layout, seed list and timeline — coming as PDF
Yellow onion grows best with friends
This crop is part of one of my field-tested bed recipes — complete layouts with timing for every plant in the bed.
See all bed recipesA friendly reminder: every garden plays by its own rules. Zones, soil, weather and a hundred small things decide what works — so this is how I did it and what worked for me, not a promise. Try, learn, adjust, try again.. that's half the fun anyway.