England, UK

Planting calendar for Stevenage

Last frost around 12 April, first frost around 16 November: about 218 frost-free days.

Last frost: 12 April
First frost: 16 November
Frost-free days: 218

Sow now: November

See the whole year

Outdoors

Broad bean
Garlic
Raspberry
Rhubarb

Under cover

Nothing this month.

The year at a glance

When each crop can be sown in Stevenage. Tap a crop for exact dates and when it’s ready to harvest.

Sow outdoorsSow under cover (a greenhouse or polytunnel)

When to sow each crop in Stevenage, month by month. Each month says whether you can sow outdoors, under cover, or both.
Crop	JJan	FFeb	MMar	AApr	MMay	JJun	JJul	AAug	SSep	OOct	NNov	DDec
Fruiting
Tomato	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Chilli	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Sweet pepper	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Aubergine	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Courgette	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Cucumber	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Squash	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Sweetcorn	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Roots
Carrot	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Beetroot	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Parsnip	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Radish	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow outdoors and under cover	October: Sow under cover	November: Not this month	December: Not this month
Potato	January: Not this month	February: Plant under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant under cover	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Turnip	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Leaves
Lettuce	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Spinach	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow outdoors and under cover	October: Sow under cover	November: Not this month	December: Not this month
Swiss chard	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Rocket	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow outdoors and under cover	October: Sow under cover	November: Not this month	December: Not this month
Celery	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow under cover	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Beans and peas
Runner bean	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
French bean	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Broad bean	January: Not this month	February: Not this month	March: Not this month	April: Not this month	May: Not this month	June: Not this month	July: Not this month	August: Not this month	September: Sow under cover	October: Sow outdoors and under cover	November: Sow outdoors and under cover	December: Sow under cover
Pea	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Onion family
Onion	January: Not this month	February: Plant under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant under cover	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Garlic	January: Not this month	February: Not this month	March: Not this month	April: Not this month	May: Not this month	June: Not this month	July: Not this month	August: Not this month	September: Plant under cover	October: Plant outdoors and under cover	November: Plant outdoors and under cover	December: Plant under cover
Leek	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Spring onion	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Shallot	January: Plant under cover	February: Plant outdoors and under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant under cover	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Brassicas
Cabbage	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Broccoli	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Cauliflower	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Brussels sprout	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Kale	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Pak choi	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Herbs
Basil	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Parsley	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Coriander	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Chives	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Mint	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow outdoors and under cover	October: Sow under cover	November: Not this month	December: Not this month
Fruit
Strawberry	January: Not this month	February: Plant under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant under cover	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Raspberry	January: Plant outdoors and under cover	February: Plant under cover	March: Not this month	April: Not this month	May: Not this month	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Plant under cover	November: Plant outdoors and under cover	December: Plant outdoors and under cover
Rhubarb	January: Plant under cover	February: Not this month	March: Not this month	April: Not this month	May: Not this month	June: Not this month	July: Not this month	August: Not this month	September: Plant under cover	October: Plant outdoors and under cover	November: Plant outdoors and under cover	December: Plant outdoors and under cover

Fruit rows show when to plant, not sow.

Crop by crop

Fruiting

TomatoOutdoors 17 May to 11 Jun; Under cover 19 Apr to 9 Jul

Sow outdoors: 17 May to 11 Jun
Under cover: 19 Apr to 9 Jul
First harvest: About 99 days after sowing. Sown on 17 May, ready around 24 August.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Tomato across the UK, town by town

ChilliOutdoors 16 May to 11 Jun; Under cover 18 Apr to 9 Jul

Sow outdoors: 16 May to 11 Jun
Under cover: 18 Apr to 9 Jul
First harvest: About 115 days after sowing. Sown on 16 May, ready around 8 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Chilli across the UK, town by town

Sweet pepperOutdoors 21 May to 16 Jun; Under cover 23 Apr to 14 Jul

Sow outdoors: 21 May to 16 Jun
Under cover: 23 Apr to 14 Jul
First harvest: About 108 days after sowing. Sown on 21 May, ready around 6 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Sweet pepper across the UK, town by town

AubergineOutdoors 21 May to 11 Jun; Under cover 23 Apr to 9 Jul

Sow outdoors: 21 May to 11 Jun
Under cover: 23 Apr to 9 Jul
First harvest: About 111 days after sowing. Sown on 21 May, ready around 9 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Aubergine across the UK, town by town

CourgetteOutdoors 16 May to 26 Jun; Under cover 18 Apr to 24 Jul

Sow outdoors: 16 May to 26 Jun
Under cover: 18 Apr to 24 Jul
First harvest: About 58 days after sowing. Sown on 16 May, ready around 13 July.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Courgette across the UK, town by town

CucumberOutdoors 16 May to 26 Jun; Under cover 18 Apr to 24 Jul

Sow outdoors: 16 May to 26 Jun
Under cover: 18 Apr to 24 Jul
First harvest: About 67 days after sowing. Sown on 16 May, ready around 22 July.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Cucumber across the UK, town by town

SquashOutdoors 16 May to 16 Jun; Under cover 18 Apr to 14 Jul

Sow outdoors: 16 May to 16 Jun
Under cover: 18 Apr to 14 Jul
First harvest: About 100 days after sowing. Sown on 16 May, ready around 24 August.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Squash across the UK, town by town

SweetcornOutdoors 11 May to 16 Jun; Under cover 13 Apr to 14 Jul

Sow outdoors: 11 May to 16 Jun
Under cover: 13 Apr to 14 Jul
First harvest: About 94 days after sowing. Sown on 11 May, ready around 13 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Sweetcorn across the UK, town by town

Roots

CarrotOutdoors 28 Mar to 6 Jul; Under cover 28 Feb to 3 Aug

Sow outdoors: 28 Mar to 6 Jul
Under cover: 28 Feb to 3 Aug
First harvest: About 101 days after sowing. Sown on 28 March, ready around 7 July.
Warmth: Hardy: grows once days average 7°C.

Carrot across the UK, town by town

BeetrootOutdoors 28 Mar to 11 Jul; Under cover 28 Feb to 8 Aug

Sow outdoors: 28 Mar to 11 Jul
Under cover: 28 Feb to 8 Aug
First harvest: About 71 days after sowing. Sown on 28 March, ready around 7 June.
Warmth: Hardy: grows once days average 7°C.

Beetroot across the UK, town by town

ParsnipOutdoors 10 Mar to 26 May; Under cover 10 Feb to 23 Jun

Sow outdoors: 10 Mar to 26 May
Under cover: 10 Feb to 23 Jun
First harvest: About 131 days after sowing. Sown on 10 March, ready around 19 July.
Warmth: Hardy: grows once days average 6°C.

Parsnip across the UK, town by town

RadishOutdoors 10 Mar to 21 Sep; Under cover 10 Feb to 19 Oct

Sow outdoors: 10 Mar to 21 Sep
Under cover: 10 Feb to 19 Oct
First harvest: About 30 days after sowing. Sown on 10 March, ready around 9 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Radish across the UK, town by town

PotatoOutdoors 10 Mar to 6 May; Under cover 10 Feb to 3 Jun

Plant outdoors: 10 Mar to 6 May
Under cover: 10 Feb to 3 Jun
First harvest: About 102 days after planting. Planted on 10 March, ready around 20 June.
Warmth: Hardy: grows once days average 6°C.

Potato across the UK, town by town

TurnipOutdoors 10 Mar to 22 Aug; Under cover 10 Feb to 19 Sep

Sow outdoors: 10 Mar to 22 Aug
Under cover: 10 Feb to 19 Sep
First harvest: About 62 days after sowing. Sown on 10 March, ready around 11 May.
Warmth: Hardy: grows once days average 6°C.

Turnip across the UK, town by town

Leaves

LettuceOutdoors 15 Mar to 17 Aug; Under cover 15 Feb to 14 Sep

Sow outdoors: 15 Mar to 17 Aug
Under cover: 15 Feb to 14 Sep
First harvest: About 71 days after sowing. Sown on 15 March, ready around 25 May.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Lettuce across the UK, town by town

SpinachOutdoors 10 Mar to 20 Sep; Under cover 10 Feb to 18 Oct

Sow outdoors: 10 Mar to 20 Sep
Under cover: 10 Feb to 18 Oct
First harvest: About 47 days after sowing. Sown on 10 March, ready around 26 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Spinach across the UK, town by town

Swiss chardOutdoors 28 Mar to 22 Aug; Under cover 28 Feb to 19 Sep

Sow outdoors: 28 Mar to 22 Aug
Under cover: 28 Feb to 19 Sep
First harvest: About 61 days after sowing. Sown on 28 March, ready around 28 May.
Warmth: Hardy: grows once days average 7°C.

Swiss chard across the UK, town by town

RocketOutdoors 10 Mar to 20 Sep; Under cover 10 Feb to 18 Oct

Sow outdoors: 10 Mar to 20 Sep
Under cover: 10 Feb to 18 Oct
First harvest: About 42 days after sowing. Sown on 10 March, ready around 21 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Rocket across the UK, town by town

CeleryOutdoors 23 Feb to 26 Apr; Under cover 26 Jan to 24 May

Sow outdoors: 23 Feb to 26 Apr
Under cover: 26 Jan to 24 May
First harvest: About 133 days after sowing. Sown on 23 February, ready around 6 July.
Warmth: Hardy: grows once days average 5°C.

Celery across the UK, town by town

Beans and peas

Runner beanOutdoors 11 May to 26 Jun; Under cover 13 Apr to 24 Jul

Sow outdoors: 11 May to 26 Jun
Under cover: 13 Apr to 24 Jul
First harvest: About 86 days after sowing. Sown on 11 May, ready around 5 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Runner bean across the UK, town by town

French beanOutdoors 11 May to 11 Jul; Under cover 13 Apr to 8 Aug

Sow outdoors: 11 May to 11 Jul
Under cover: 13 Apr to 8 Aug
First harvest: About 68 days after sowing. Sown on 11 May, ready around 18 July.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

French bean across the UK, town by town

Broad beanOutdoors 6 Oct to 23 Nov; Under cover 8 Sep to 21 Dec

Sow outdoors: 6 Oct to 23 Nov
Under cover: 8 Sep to 21 Dec
First harvest: About 220 days after sowing. Sown on 6 October, ready around 14 May.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Broad bean across the UK, town by town

PeaOutdoors 10 Mar to 10 Jun; Under cover 10 Feb to 8 Jul

Sow outdoors: 10 Mar to 10 Jun
Under cover: 10 Feb to 8 Jul
First harvest: About 82 days after sowing. Sown on 10 March, ready around 31 May.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Pea across the UK, town by town

Onion family

OnionOutdoors 5 Mar to 26 Apr; Under cover 5 Feb to 24 May

Plant outdoors: 5 Mar to 26 Apr
Under cover: 5 Feb to 24 May
First harvest: About 141 days after planting. Planted on 5 March, ready around 24 July.
Warmth: Hardy: grows once days average 6°C.

Onion across the UK, town by town

GarlicOutdoors 6 Oct to 3 Dec; Under cover 8 Sep to 31 Dec

Plant outdoors: 6 Oct to 3 Dec
Under cover: 8 Sep to 31 Dec
First harvest: About 250 days after planting. Planted on 6 October, ready around 13 June.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across the UK, town by town

LeekOutdoors 10 Mar to 25 Jun; Under cover 10 Feb to 23 Jul

Sow outdoors: 10 Mar to 25 Jun
Under cover: 10 Feb to 23 Jul
First harvest: About 149 days after sowing. Sown on 10 March, ready around 6 August.
Warmth: Hardy: grows once days average 6°C.

Leek across the UK, town by town

Spring onionOutdoors 23 Feb to 6 Sep; Under cover 26 Jan to 4 Oct

Sow outdoors: 23 Feb to 6 Sep
Under cover: 26 Jan to 4 Oct
First harvest: About 73 days after sowing. Sown on 23 February, ready around 7 May.
Warmth: Hardy: grows once days average 5°C.

Spring onion across the UK, town by town

ShallotOutdoors 7 Feb to 26 Apr; Under cover 10 Jan to 24 May

Plant outdoors: 7 Feb to 26 Apr
Under cover: 10 Jan to 24 May
First harvest: About 135 days after planting. Planted on 7 February, ready around 22 June.
Warmth: Hardy: grows once days average 5°C.

Shallot across the UK, town by town

Brassicas

CabbageOutdoors 10 Mar to 10 Jul; Under cover 10 Feb to 7 Aug

Sow outdoors: 10 Mar to 10 Jul
Under cover: 10 Feb to 7 Aug
First harvest: About 112 days after sowing. Sown on 10 March, ready around 30 June.
Warmth: Hardy: grows once days average 6°C.

Cabbage across the UK, town by town

BroccoliOutdoors 28 Mar to 26 Jun; Under cover 28 Feb to 24 Jul

Sow outdoors: 28 Mar to 26 Jun
Under cover: 28 Feb to 24 Jul
First harvest: About 91 days after sowing. Sown on 28 March, ready around 27 June.
Warmth: Hardy: grows once days average 7°C.

Broccoli across the UK, town by town

CauliflowerOutdoors 10 Mar to 10 Jun; Under cover 10 Feb to 8 Jul

Sow outdoors: 10 Mar to 10 Jun
Under cover: 10 Feb to 8 Jul
First harvest: About 121 days after sowing. Sown on 10 March, ready around 9 July.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Cauliflower across the UK, town by town

Brussels sproutOutdoors 10 Mar to 11 May; Under cover 10 Feb to 8 Jun

Sow outdoors: 10 Mar to 11 May
Under cover: 10 Feb to 8 Jun
First harvest: About 175 days after sowing. Sown on 10 March, ready around 1 September.
Warmth: Hardy: grows once days average 6°C.

Brussels sprout across the UK, town by town

KaleOutdoors 28 Mar to 11 Jul; Under cover 28 Feb to 8 Aug

Sow outdoors: 28 Mar to 11 Jul
Under cover: 28 Feb to 8 Aug
First harvest: About 81 days after sowing. Sown on 28 March, ready around 17 June.
Warmth: Hardy: grows once days average 7°C.

Kale across the UK, town by town

Pak choiOutdoors 11 Apr to 6 Sep; Under cover 14 Mar to 4 Oct

Sow outdoors: 11 Apr to 6 Sep
Under cover: 14 Mar to 4 Oct
First harvest: About 46 days after sowing. Sown on 11 April, ready around 27 May.
Warmth: Hardy: grows once days average 8°C; bolts in hot weather.

Pak choi across the UK, town by town

Herbs

BasilOutdoors 12 Apr to 12 Jul; Under cover 15 Mar to 9 Aug

Sow outdoors: 12 Apr to 12 Jul
Under cover: 15 Mar to 9 Aug
First harvest: About 60 days after sowing. Sown on 12 April, ready around 11 June.
Warmth: Tender: needs days averaging 8°C or more, and no frost.

Basil across the UK, town by town

ParsleyOutdoors 10 Mar to 21 Aug; Under cover 10 Feb to 18 Sep

Sow outdoors: 10 Mar to 21 Aug
Under cover: 10 Feb to 18 Sep
First harvest: About 77 days after sowing. Sown on 10 March, ready around 26 May.
Warmth: Hardy: grows once days average 6°C.

Parsley across the UK, town by town

CorianderOutdoors 28 Mar to 6 Sep; Under cover 28 Feb to 4 Oct

Sow outdoors: 28 Mar to 6 Sep
Under cover: 28 Feb to 4 Oct
First harvest: About 51 days after sowing. Sown on 28 March, ready around 18 May.
Warmth: Hardy: grows once days average 7°C; bolts in hot weather.

Coriander across the UK, town by town

ChivesOutdoors 10 Mar to 26 May; Under cover 10 Feb to 23 Jun

Sow outdoors: 10 Mar to 26 May
Under cover: 10 Feb to 23 Jun
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 6°C.

Chives across the UK, town by town

MintOutdoors 28 Mar to 5 Oct; Under cover 28 Feb to 2 Nov

Sow outdoors: 28 Mar to 5 Oct
Under cover: 28 Feb to 2 Nov
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 7°C.

Mint across the UK, town by town

Fruit

StrawberryOutdoors 10 Mar to 11 May; Under cover 10 Feb to 8 Jun

Plant outdoors: 10 Mar to 11 May
Under cover: 10 Feb to 8 Jun
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 6°C.

Strawberry across the UK, town by town

RaspberryOutdoors 5 Nov to 10 Jan; Under cover 8 Oct to 7 Feb

Plant outdoors: 5 Nov to 10 Jan
Under cover: 8 Oct to 7 Feb
First harvest: Crops every year once it’s established.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Raspberry across the UK, town by town

RhubarbOutdoors 19 Oct to 19 Dec; Under cover 21 Sep to 16 Jan

Plant outdoors: 19 Oct to 19 Dec
Under cover: 21 Sep to 16 Jan
First harvest: Crops every year once it’s established.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Rhubarb across the UK, town by town

Nearby

Also covers

St Albans, Welwyn Garden City, Borehamwood, Harpenden, and nearby villages. Dates are within a few days across the area.

Questions about growing in Stevenage

When is the last frost in Stevenage?

On average around 12 April, and the first autumn frost comes around 16 November. In a cold spring a frost can come a week or two late, so tender plants are safest out a week after the date.

Can I grow tomatoes outdoors in Stevenage?

Yes. Plant them outdoors 17 May to 11 Jun, or under cover 19 Apr to 9 Jul.

What can I sow in Stevenage in November?

Outdoors: broad bean, garlic, raspberry, rhubarb.

How accurate are these dates?

They’re worked out from 30 years of climate data for this spot, adjusted for its height, so they’re a good guide for a typical year. Check the forecast before planting out anything tender.

Get these dates as reminders

Bia turns this calendar into a nudge when it’s time to sow, plant out and harvest, for your plot in Stevenage. Free for 2 months.

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How these dates are worked out: climate records for this spot (ERA5-Land, 1995 to 2024), the local frost dates and the height above sea level turn a seed-packet date into a local one. Contains modified Copernicus Climate Change Service information; towns from GeoNames (CC BY 4.0). How sowing dates work