When to plant onion in Anaheim
Onion is cold-hardy, so every date keys off Anaheim's frost dates.
Step 1 · Sow
Direct sow outdoors
Jan 1 – Jan 22
Sow straight into warm, workable soil.
Step 2 · Harvest
Harvest window
Apr 1 – Apr 21
Picking runs until conditions turn against the crop.
Window
Days to maturity
90 – 110 d
From sowing to first pick.
Common questions
When can I sow onion outdoors in Anaheim?
Direct-sow around early January (Jan 1–Jan 22) in Anaheim, based on its local frost dates. Confidence 80%.
When will onion be ready to harvest in Anaheim?
Expect to harvest from around early April (Apr 1–Apr 21) in Anaheim, based on its local frost dates. Confidence 74%.
How long is the growing season in Anaheim?
Anaheim has roughly 365 frost-free days, which is enough time to grow onion to maturity outdoors.
The rule of thumb
Sow onion as soon as the soil is workable — it tolerates cool weather and light frost. Every date on this page is derived from that rule and Anaheim's frost dates.
Confidence 82/100 · Curated · based on NOAA GHCN-Daily 1991–2020 normal · frost dates are probabilities, not guarantees.