Cornflower · Chandigarh, Chandigarh, India
When to sow cornflowers in Chandigarh
Main outdoor window
not outdoors here
The window this page is built around.
Timed from last spring frost
no spring frost
In Chandigarh, 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 Chandigarh
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.
Cornflowers through the year
Against the frost risk in Chandigarh
Why these dates
Sow direct three weeks before the last frost, thinly and where it is to flower - it resents transplanting once the taproot is down. Deadhead relentlessly, because a plant allowed to set seed stops flowering within a fortnight. An autumn sowing gives much taller, sturdier plants.
Hardy to about -10C as a young plant, which is what makes autumn sowing possible in zone 7 and milder. Dislikes humid heat and finishes early in a hot 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. Cornflowers are timed from 6 weeks before that frost for an indoor start, with planting out 2 weeks before it, and this page simply resolves those offsets against the frost date computed for Chandigarh.
Hardiness is not the obstacle here. Chandigarh is zone 10b, comfortably inside the range this crop is rated for, so an established plant should come through an average winter without protection.
Also in Chandigarh
Other flowers to time
Growing cornflowers in Chandigarh
How much frost will cornflowers tolerate?
Hardy to about -10C as a young plant, which is what makes autumn sowing possible in zone 7 and milder. Dislikes humid heat and finishes early in a hot summer.