Sunflower · Ludhiana, Punjab, India
When to sow sunflowers in Ludhiana
Main outdoor window
15-29 Jan
The window this page is built around.
Timed from last spring frost
8 January
In Ludhiana, on your chosen risk.
Ready to pick
26 Mar - 25 Apr
If you plant at the start of the window.
The average last frost. Half of all years are later than this.
Step by step in Ludhiana
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.
Sow direct
15-29 Jan
One week after your last frost.
In flower
26 Mar - 25 Apr
Sunflowers through the year
Against the frost risk in Ludhiana
Why these dates
Sow a short row every two weeks until ten weeks before first frost for continuous cut flowers rather than one brief spectacle.
Seedlings are killed by frost. Once flowering, stems tolerate a light autumn frost without damage.
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. Sunflowers are timed for direct sowing 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Ludhiana.
Growing sunflowers in Ludhiana
When should I plant sunflowers in Ludhiana?
Aim for 15-29 Jan in an average year. If you would rather not gamble on the weather, wait until 30 Jan - 13 Feb - by then frost has finished in nine years out of ten.
When will sunflowers be ready to harvest in Ludhiana?
Expect to start picking around 26 Mar - 25 Apr, based on 70 to 100 days to maturity from the planting date calculated for this location.
How much frost will sunflowers tolerate?
Seedlings are killed by frost. Once flowering, stems tolerate a light autumn frost without damage.