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Last and first frost dates in Norwich

United Kingdom

In Norwich the last spring frost usually comes around 31 March and the first autumn frost around 28 November, which leaves about 242 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 27 May to 8 August.

Last spring frostaround 31 March
First autumn frostaround 28 November
Frost-free days242 days

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Norwich?

The last frost in Norwich usually comes around 31 March: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 10 March, while corn waits until 3 May. The first autumn frost follows around 28 November, about 242 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha14 February – 20 August26 March – 29 September16 April – 29 September
Ageratumfrom 11 March—from 27 May
Arugula——sow 10 March – 24 October
Basil29 April – 26 September6 June – 3 November27 June – 3 November
Beet——sow 10 March – 29 September
Bell Pepper7 April – 9 June6 June – 8 August27 June – 8 August
Black-eyed Susanfrom 23 January—from 16 April
Bok Choy19 February – 7 October26 March – 11 November16 April – 11 November
Borage——sow 7 April – 4 October
Broad bean——sow 10 March – 20 August
Broccoli——sow 10 March – 13 August
Brussels Sprouts3 January – 11 July17 February – 25 August10 March – 25 August
Busy Lizziefrom 13 January—from 7 April
Cabbage——sow 10 March – 21 July
Calendula——sow from 10 March
Carrot——sow 10 March – 5 September
Cauliflower6 January – 13 August17 February – 24 September10 March – 24 September
Celeriac8 January – 10 June26 March – 26 August16 April – 26 August
Celery8 January – 20 June26 March – 5 September16 April – 5 September
Celosiafrom 1 Aprilfrom 16 Mayfrom 6 June
Chamomile——sow 10 March – 24 September
Chayote14 January – 3 June12 April – 30 August3 May – 30 August
Chickpea——sow 10 March – 10 August
Chicory23 January – 4 September—10 March – 29 September
Chili Pepper7 April – 16 July6 June – 14 September27 June – 14 September
China asterfrom 15 Aprilfrom 6 Junefrom 27 June
Chives——sow 10 March – 15 September
Cilantro——sow 10 March – 25 September
Corn——sow 3 May – 10 August
Corn poppy——sow from 10 March
Cosmosfrom 1 Aprilfrom 16 Mayfrom 6 June
Cucumber9 May – 16 August6 June – 13 September27 June – 13 September
Daikon——sow 10 March – 22 September
Delphiniumfrom 20 December—from 10 March
Dill——sow 10 March – 5 October
Edging lobeliafrom 22 January—from 16 April
Eggplant7 April – 9 June6 June – 8 August27 June – 8 August
Florence fennel9 February – 20 August26 March – 4 October16 April – 4 October
Foxglovefrom 2 December—from 10 March
Garden sorrel——sow 10 March – 23 September
Green Beans——sow 6 June – 18 August
Hollyhock——sow from 10 March
Hyssop——sow 10 March – 16 August
Kale——sow 10 March – 17 September
Kiwano4 April – 23 August6 May – 24 September27 May – 24 September
Kohlrabi——sow 10 March – 27 September
Leek9 December – 1 June17 February – 10 August10 March – 10 August
Lemon balm——sow 10 March – 19 September
Lettuce——sow 10 March – 2 October
Lisianthusfrom 22 Novemberfrom 17 Februaryfrom 10 March
Lovage——sow from 10 March
Luffa25 April – 17 June6 June – 29 July27 June – 29 July
Marigoldfrom 12 Februaryfrom 26 Marchfrom 16 April
Marjoram7 April – 4 September—27 June – 3 November
Melon9 May – 3 August6 June – 31 August27 June – 31 August
Microgreens——sow 6 June – 14 November
Moringa3 May – 9 September27 June – 3 November18 July – 3 November
Moss rosefrom 20 January—from 7 April
Mustard greens——sow 10 March – 14 October
Napa cabbage21 February – 14 September26 March – 17 October16 April – 17 October
Nasturtiumfrom 16 Februaryfrom 26 Marchfrom 16 April
Okra25 April – 28 August6 June – 9 October27 June – 9 October
Oregano19 December – 25 August17 February – 24 October10 March – 24 October
Pansyfrom 23 Decemberfrom 17 Februaryfrom 10 March
Parsley——sow 10 March – 13 September
Parsnip——sow 10 March – 2 August
Peanut30 April – 24 July6 June – 30 August27 June – 30 August
Peas——sow 10 March – 15 September
Petuniafrom 4 Aprilfrom 6 Junefrom 27 June
Physalis22 March – 21 July6 May – 4 September27 May – 4 September
Pumpkin25 April – 22 June6 June – 3 August27 June – 3 August
Purple coneflowerfrom 17 December—from 10 March
Radish——sow 10 March – 29 October
Sage30 December – 21 August17 February – 9 October10 March – 9 October
Scarlet sagefrom 15 March—from 27 May
Snapdragonfrom 14 Decemberfrom 17 Februaryfrom 10 March
Soybean——sow 27 June – 9 September
Spinach——sow 10 March – 4 October
Stevia18 March – 12 July6 May – 30 August27 May – 30 August
Stock——sow from 10 March
Sunflower——sow from 6 June
Sweet alyssum——sow from 10 March
Sweet Corn29 March – 4 September20 April – 26 September11 May – 26 September
Sweet peafrom 6 Januaryfrom 17 Februaryfrom 10 March
Sweet William——sow from 10 March
Swiss Chard——sow 10 March – 29 September
Thyme——sow 10 March – 10 August
Tomato15 March – 17 June6 May – 8 August27 May – 8 August
Turnip——sow 10 March – 1 October
Watercress——sow 10 March – 12 October
Watermelon9 May – 22 July6 June – 19 August27 June – 19 August
Zinniafrom 23 Mayfrom 27 Junefrom 18 July
Zucchini16 May – 21 August6 June – 11 September27 June – 11 September

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Norwich

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 16 days after the last spring frost and 15 °C 57 days after it.

SoilDateAgainst the last spring frost
5 °C9 January81 days earlier
10 °C16 April16 days later
15 °C27 May57 days later
18 °C27 June88 days later

Frost dates near Norwich

Of the nearest cities on our list, the last spring frost ends earliest in Ipswich (15 March) and latest in Leicester (20 April).

CityDistanceLast spring frostFirst autumn frost
Ipswich64 km15 March29 November
Cambridge93 km3 April24 November
Lincoln (United Kingdom)140 km1 April19 November
London158 km4 April23 November
Leicester164 km20 April19 November

Seeds, seedlings and markets in Norwich

Within 15 km of Norwich OpenStreetMap lists 20 garden centres, 1 farm-supply shop, 1 plant nursery, 1 market and 14 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Leslie Terrance plant shop & cafe, 2 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Norwich

Frosts in Norwich usually come from about 28 November to about 31 March. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Norwich by month

Average weather in Norwich over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: July (21.5 °C) and August (21.6 °C). No month averages below 0 °C at night; the coldest nights, in January, average 1.7 °C. About 720 mm of rain falls in a year, on 138 days; October is the wettest month (76 mm) and April the driest (40 mm).

MonthDay, °CNight, °CRain, mmRainy days
January7.11.75511
February8.82.75711
March10.43.45413
April12.54.54010
May16.17.95511
June19.611.36612
July21.5137313
August21.613.35511
September1911.36310
October14.98.77613
November10.45.16311
December8.43.66312

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

CropWhen to plant
Bearded Irisby 29 October
Crocus29 October – end of December
Daffodil29 October – end of December
Garlic29 October – end of December
Grape hyacinthby 29 October
Helleboreby 29 October
Hyacinth29 October – end of December
Lilyby 29 October
Ornamental onionby 29 October
Peonyby 29 October
Saffronby 29 October
Snowdropby 29 October
Tulip29 October – end of December
Wild garlicby 29 October

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).