botanical plate
onion
onion
Onion
Timing everywhere hangs on one number: the local start of the workable season. Enter your town for exact dates where you garden.
Days to maturity
90–110 d
Frost
hardy
Soil temp
≥ 10 °C
How onion timing shifts by place
Southern-hemisphere places mirror the calendar — their season straddles the new year. Equatorial highlands have no frost at all, so the limiting factor becomes rainfall, not cold. See onion dates for your place →