When to Sow Onion?
Onion is a popular garden vegetable grown across temperate climates. Below are the exact sowing dates from our plant database — click the button to see personalised dates in the interactive planner.
Sowing dates – 🧅 Onion
| Sowing dates | Onion |
|---|---|
| Indoor sowing | — |
| Transplanting | — |
| Direct sowing | Mar–Apr |
| Harvest period | Jul–Sep |
| Days to harvest | 120 |
Plan your Onion in the app
Gardener Planner lets you match sowing dates to your climate zone, track progress and plan crop rotation across your whole garden.
Open Gardener Planner →Frequently asked questions
When to sow Onion indoors?
Onion does not need to be started indoors — sow directly into the garden.
When to transplant Onion?
Onion is direct-sown and does not require transplanting.
When to harvest Onion?
Harvest Onion from Jul–Sep (approx. 120 days from transplanting/germination).