
Vegetables Β· Temperate
Onion
Amaryllidaceae
At a glance
- Plant spacing
- 10 cm
- USDA zones
- 3aβ9b
- Frost-sensitive
- no
- Growth duration
- 20 weeks
Which beds suit?
- Sun (prefers)
- full sunAlso okay:partial shade
- Soil (prefers)
- sandyAlso okay:loamyraised-bed mix
- Drainage (prefers)
- very free-drainingAlso okay:normal
Seed & start
Either works
Direct sow works; pre-culture gains 4β6 weeks head start.
Stachi's tip
Plant onions as sets, don't sow β sets are far easier than seed. Plant March/April, harvest August/September. Let the skin dry well before storing β otherwise they rot in the pantry.
Sowing
Transplanting
Harvest
Good neighbours
Avoid these neighbours
Good pre-cultures
Stachi has no specific pre-cultures recorded.
Sources
- Kreuter, Bio-Garten
- Kosmos Gartenkalender
- LLM-Baseline-Intercrop
- LLM-Baseline-2026-05-09 yieldKg
- LLM-Baseline-2026-05-10 family-zehrer
- LLM-Baseline-2026-05-10 sun-soil-drainage
Articles about this plant
Harvesting and drying onions: when to pull them β and how to store them for months
My neighbour Frau Schneider pulled her onions too early last year. Instead of drying out, they started to rot. The difference between an onion that keeps until February and one that turns mushy in October comes down to a single sign.
Garlic from the raised bed: how to tell it's truly ready β and how to store it for a year
Garlic has a small harvest window. Pull it too early and it moulds in three weeks. Leave it too long and the bulb splits open. Here is the one sign I watch for β and how to store it so it lasts until next summer.
Companion planting table for raised beds β the pairings that matter
A companion-planting table to print: good neighbours, bad neighbours, three all-rounders. Plus the five pairs that get you 80 % of the effect β if you only want to remember five.
Companion planting for beginners β who likes whom in the raised bed
Companion planting sounds like a biochemistry degree. It isn't. Fifteen pairing rules, three team players, three loners β and a story about my bed in 2023.
Related plants
Products mentioned in this post
- Plantura organic tomato seed set (10 varieties)Open-pollinated, good germination β robust for raised beds.
- Organic tomato seed set, 14 varieties
- Organic heirloom tomato seed set (Demeter, 12 varieties)
- Organic vegetable seed set, 10 varietiesCucumber, tomato, beetroot, broccoli, carrot, chard & more.