Berlin, Berlin
When to plant onion in Berlin
Station data · 86% confidence cool seasonhardy to frost
- Harvestearly JulyJul 3 – Jul 23 · 77% conf.
- Start seeds indoorsmid FebruaryFeb 14 – Mar 7 · 82% conf.
- Transplant outdoorsearly AprilApr 4 – Apr 25 · 86% conf.
The growing window at a glance
Frost-free growing season · 168 daysFrost risk (before Apr 25 / after Oct 10)
Onion at a glance in Berlin
- Needs soil above 10°C to germinate well.
- Days to maturity: 90–110 days.
- Climate zone: Continental, warm summer (Dfb).
Frost dates are probabilities, not guarantees. Your garden's microclimate — slopes, walls, urban heat, cold pockets — can shift these dates by a week or more. Use them as a confident starting point, then watch your local forecast.
Frequently asked
When will onion be ready to harvest in Berlin?
Expect to harvest from around early July (Jul 3–Jul 23) in Berlin, based on its local frost dates. Confidence 77%.
When should I start onion seeds indoors in Berlin?
Start seeds indoors around mid February (Feb 14–Mar 7) in Berlin, based on its local frost dates. Confidence 82%.
When can I transplant onion outdoors in Berlin?
Transplant outdoors around early April (Apr 4–Apr 25) in Berlin, based on its local frost dates. Confidence 86%.
How long is the growing season in Berlin?
Berlin has roughly 168 frost-free days, which is enough time to grow onion to maturity outdoors.