Safe to Plant

Coriander · Tláhuac, Mexico City, Mexico

When to plant coriander in Tláhuac

Main outdoor window

26 Jan - 5 Feb

The window this page is built around.

Timed from last spring frost

9 February

In Tláhuac, on your chosen risk.

Ready to pick

12 Mar - 6 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 Tláhuac

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 for autumn

4-25 Aug

Counting back 84 days from your first frost so the crop matures in time.

Sow direct

26 Jan - 5 Feb

Two weeks before your last frost.

Harvest

12 Mar - 6 Apr

Sow in succession. A single sowing gives you a single glut. Sow a short row every 14 days through the window above and you get a steady supply instead.
Frost tolerance
Half-hardy
Damaged below
-5°C (23°F)
Days to maturity
45–70
Min soil temp
7°C (44.6°F)
Spacing
15 cm
Sowing depth
12 mm (0.5 in)
Sun
Full

Coriander through the year

Against the frost risk in Tláhuac

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Frost risk Autumn sowing Sow direct Harvest Today

Why these dates

Sow every two weeks from two weeks before last frost. The autumn sowing lasts far longer than any summer one, and in mild climates overwinters.

Takes -5C and grows happily in cool weather. Heat, not frost, is what ends a coriander plant.

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. Coriander are timed for direct sowing 2 weeks before it, and this page simply resolves those offsets against the frost date computed for Tláhuac.

The median frost-free season here is 281 days, against 45 to 70 days to maturity for this crop counted from sowing. That margin is what decides whether a late sowing is worth attempting.

See every crop timed for Tláhuac →

Growing coriander in Tláhuac

When should I plant coriander in Tláhuac?

Aim for 26 Jan - 5 Feb in an average year. If you would rather not gamble on the weather, wait until 14-24 Feb - by then frost has finished in nine years out of ten.

When will coriander be ready to harvest in Tláhuac?

Expect to start picking around 12 Mar - 6 Apr, based on 45 to 70 days to maturity from the planting date calculated for this location.

How much frost will coriander tolerate?

Takes -5C and grows happily in cool weather. Heat, not frost, is what ends a coriander plant.