Shirley poppy · Zhuhai, Guangdong, China
When to sow shirley poppies in Zhuhai
Main outdoor window
not outdoors here
The window this page is built around.
Timed from last spring frost
no spring frost
In Zhuhai, 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 Zhuhai
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.
Shirley poppies through the year
Against the frost risk in Zhuhai
Why these dates
Sow direct four weeks before the last frost, on the surface with no covering - the seed needs light to germinate and disappears if raked in. Sowing onto snow or frosted ground works well and spaces the seed for you. It cannot be transplanted at any size, so sow where it is to flower.
Hardy to about -12C and germinates in cold soil, so it is a natural for autumn or late-winter sowing. Ends abruptly in the first real heat of summer.
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. Shirley poppies are timed for direct sowing 4 weeks before it, and this page simply resolves those offsets against the frost date computed for Zhuhai.
Zhuhai sits in zone 11a, which is milder than this crop wants, and a winter that never really arrives is its own problem. The dates below still describe the right time of year; the open question is survival rather than timing.
Also in Zhuhai
Other flowers to time
Growing shirley poppies in Zhuhai
How much frost will shirley poppies tolerate?
Hardy to about -12C and germinates in cold soil, so it is a natural for autumn or late-winter sowing. Ends abruptly in the first real heat of summer.