Safe to Plant

Leaf amaranth · Naples, Campania, Italy

When to plant leaf amaranth in Naples

Main outdoor window

14 Mar - 11 Apr

The window this page is built around.

Timed from last spring frost

28 February

In Naples, on your chosen risk.

Ready to pick

1 Jun - 31 Oct

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 Naples

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

14 Mar - 11 Apr

Two weeks after your last frost.

Harvest

1 Jun - 31 Oct

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
Tender
Damaged below
0°C (32°F)
Days to maturity
30–45
Min soil temp
18°C (64.4°F)
Spacing
20 cm
Sowing depth
5 mm (0.2 in)
Sun
Full

Leaf amaranth through the year

Against the frost risk in Naples

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

Frost risk Sow direct Harvest Today

Why these dates

Sow onto warm soil from two weeks after the last frost and every two weeks after that. Cut the main stem at about 30cm and it branches into a bushier, more productive plant.

Killed at 0C with no margin at all. Sow late, harvest until the first autumn frost, and expect the plants to collapse overnight when it comes.

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. Leaf amaranth are timed for direct sowing 2 weeks after it, and this page simply resolves those offsets against the frost date computed for Naples.

The median frost-free season here is 294 days, against 30 to 45 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 Naples →

Also in Naples

Other vegetables to time

Tomatoes tender Lettuce half hardy Potatoes half hardy Courgettes tender Sweet peppers tender Carrots hardy Cucumbers tender Green beans tender Peas hardy Garlic very hardy Chilli peppers tender Sweetcorn tender

Growing leaf amaranth in Naples

When should I plant leaf amaranth in Naples?

Aim for 14 Mar - 11 Apr in an average year. If you would rather not gamble on the weather, wait until 15 Apr - 13 May - by then frost has finished in nine years out of ten.

When will leaf amaranth be ready to harvest in Naples?

Expect to start picking around 1 Jun - 31 Oct, based on 30 to 45 days to maturity from the planting date calculated for this location.

How much frost will leaf amaranth tolerate?

Killed at 0C with no margin at all. Sow late, harvest until the first autumn frost, and expect the plants to collapse overnight when it comes.