Sweetcorn · Cairo, Cairo, Egypt
When to plant sweetcorn in Cairo
Main outdoor window
not outdoors here
The window this page is built around.
Timed from last spring frost
no spring frost
In Cairo, 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 Cairo
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.
Sweetcorn through the year
Against the frost risk in Cairo
Why these dates
Seed rots in cold wet soil. Sowing a week after last frost into 15C soil beats sowing on the frost date into 10C soil almost every time.
Seedlings survive a very light frost if the growing point is still below soil level, but growth stalls. Mature plants are killed outright.
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. Sweetcorn are timed for direct sowing 1 weeks after it, and this page simply resolves those offsets against the frost date computed for Cairo.
Also in Cairo
Other vegetables to time
Growing sweetcorn in Cairo
How much frost will sweetcorn tolerate?
Seedlings survive a very light frost if the growing point is still below soil level, but growth stalls. Mature plants are killed outright.