Spring onion · Osasco, São Paulo, Brazil
When to plant spring onions in Osasco
Main outdoor window
not outdoors here
The window this page is built around.
Timed from last spring frost
no spring frost
In Osasco, on your chosen risk.
First autumn frost
no autumn frost
The far end of the outdoor season.
The average last frost. Half of all years are later than this.
Step by step in Osasco
Each window is a range, not a single day. Earlier in the range buys you a longer season; later in it buys you a safer one.
Spring onions through the year
Against the frost risk in Osasco
Why these dates
Sow direct every three weeks from four weeks before the last frost until about ten weeks before the first. An autumn sowing overwinters for a very early spring crop.
Tolerates about -8C. Autumn sowings survive most temperate winters and stand through cold weather without bolting.
Seed packets and extension guides express timing as weeks either side of the last spring frost, because that is the only reference point that travels. Spring onions are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Osasco.
Nearby
Spring onions in places close by
Also in Osasco
Other vegetables to time
Growing spring onions in Osasco
How much frost will spring onions tolerate?
Tolerates about -8C. Autumn sowings survive most temperate winters and stand through cold weather without bolting.