Wales, UK

Planting calendar for Cwmbran

Last frost around 12 April, first frost around 21 November: about 223 frost-free days.

Last frost: 12 April
First frost: 21 November
Frost-free days: 223

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 Cwmbran. 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 Cwmbran, 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: Not this month	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: Not this month	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 outdoors and under cover	August: Sow under cover	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 outdoors and 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 outdoors and 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 outdoors and 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 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.

Tomato across the UK, town by town

ChilliOutdoors 20 May to 16 Jun; Under cover 22 Apr to 14 Jul

Sow outdoors: 20 May to 16 Jun
Under cover: 22 Apr to 14 Jul
First harvest: About 128 days after sowing. Sown on 20 May, ready around 25 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Chilli across the UK, town by town

Sweet pepperOutdoors 25 May to 22 Jun; Under cover 27 Apr to 20 Jul

Sow outdoors: 25 May to 22 Jun
Under cover: 27 Apr to 20 Jul
First harvest: About 121 days after sowing. Sown on 25 May, ready around 23 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Sweet pepper across the UK, town by town

AubergineOutdoors 25 May to 16 Jun; Under cover 27 Apr to 14 Jul

Sow outdoors: 25 May to 16 Jun
Under cover: 27 Apr to 14 Jul
First harvest: About 124 days after sowing. Sown on 25 May, ready around 26 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Aubergine across the UK, town by town

CourgetteOutdoors 20 May to 3 Jul; Under cover 22 Apr to 31 Jul

Sow outdoors: 20 May to 3 Jul
Under cover: 22 Apr to 31 Jul
First harvest: About 61 days after sowing. Sown on 20 May, ready around 20 July.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Courgette across the UK, town by town

CucumberOutdoors 20 May to 3 Jul; Under cover 22 Apr to 31 Jul

Sow outdoors: 20 May to 3 Jul
Under cover: 22 Apr to 31 Jul
First harvest: About 71 days after sowing. Sown on 20 May, ready around 30 July.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Cucumber across the UK, town by town

SquashOutdoors 20 May to 22 Jun; Under cover 22 Apr to 20 Jul

Sow outdoors: 20 May to 22 Jun
Under cover: 22 Apr to 20 Jul
First harvest: About 108 days after sowing. Sown on 20 May, ready around 5 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Squash across the UK, town by town

SweetcornOutdoors 15 May to 22 Jun; Under cover 17 Apr to 20 Jul

Sow outdoors: 15 May to 22 Jun
Under cover: 17 Apr to 20 Jul
First harvest: About 100 days after sowing. Sown on 15 May, ready around 23 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Sweetcorn across the UK, town by town

Roots

CarrotOutdoors 29 Mar to 15 Jul; Under cover 1 Mar to 12 Aug

Sow outdoors: 29 Mar to 15 Jul
Under cover: 1 Mar to 12 Aug
First harvest: About 103 days after sowing. Sown on 29 March, ready around 10 July.
Warmth: Hardy: grows once days average 7°C.

Carrot across the UK, town by town

BeetrootOutdoors 29 Mar to 2 Aug; Under cover 1 Mar to 30 Aug

Sow outdoors: 29 Mar to 2 Aug
Under cover: 1 Mar to 30 Aug
First harvest: About 72 days after sowing. Sown on 29 March, ready around 9 June.
Warmth: Hardy: grows once days average 7°C.

Beetroot across the UK, town by town

ParsnipOutdoors 11 Mar to 31 May; Under cover 11 Feb to 28 Jun

Sow outdoors: 11 Mar to 31 May
Under cover: 11 Feb to 28 Jun
First harvest: About 136 days after sowing. Sown on 11 March, ready around 25 July.
Warmth: Hardy: grows once days average 6°C.

Parsnip across the UK, town by town

RadishOutdoors 11 Mar to 19 Sep; Under cover 11 Feb to 17 Oct

Sow outdoors: 11 Mar to 19 Sep
Under cover: 11 Feb to 17 Oct
First harvest: About 30 days after sowing. Sown on 11 March, ready around 10 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Radish across the UK, town by town

PotatoOutdoors 11 Mar to 9 May; Under cover 11 Feb to 6 Jun

Plant outdoors: 11 Mar to 9 May
Under cover: 11 Feb to 6 Jun
First harvest: About 105 days after planting. Planted on 11 March, ready around 24 June.
Warmth: Hardy: grows once days average 6°C.

Potato across the UK, town by town

TurnipOutdoors 11 Mar to 19 Aug; Under cover 11 Feb to 16 Sep

Sow outdoors: 11 Mar to 19 Aug
Under cover: 11 Feb to 16 Sep
First harvest: About 64 days after sowing. Sown on 11 March, ready around 14 May.
Warmth: Hardy: grows once days average 6°C.

Turnip across the UK, town by town

Leaves

LettuceOutdoors 17 Mar to 15 Aug; Under cover 17 Feb to 12 Sep

Sow outdoors: 17 Mar to 15 Aug
Under cover: 17 Feb to 12 Sep
First harvest: About 74 days after sowing. Sown on 17 March, ready around 30 May.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Lettuce across the UK, town by town

SpinachOutdoors 11 Mar to 20 Sep; Under cover 11 Feb to 18 Oct

Sow outdoors: 11 Mar to 20 Sep
Under cover: 11 Feb to 18 Oct
First harvest: About 48 days after sowing. Sown on 11 March, ready around 28 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Spinach across the UK, town by town

Swiss chardOutdoors 29 Mar to 19 Aug; Under cover 1 Mar to 16 Sep

Sow outdoors: 29 Mar to 19 Aug
Under cover: 1 Mar to 16 Sep
First harvest: About 62 days after sowing. Sown on 29 March, ready around 30 May.
Warmth: Hardy: grows once days average 7°C.

Swiss chard across the UK, town by town

RocketOutdoors 11 Mar to 20 Sep; Under cover 11 Feb to 18 Oct

Sow outdoors: 11 Mar to 20 Sep
Under cover: 11 Feb to 18 Oct
First harvest: About 43 days after sowing. Sown on 11 March, ready around 23 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Rocket across the UK, town by town

CeleryOutdoors 23 Feb to 29 Apr; Under cover 26 Jan to 27 May

Sow outdoors: 23 Feb to 29 Apr
Under cover: 26 Jan to 27 May
First harvest: About 138 days after sowing. Sown on 23 February, ready around 11 July.
Warmth: Hardy: grows once days average 5°C.

Celery across the UK, town by town

Beans and peas

Runner beanOutdoors 15 May to 3 Jul; Under cover 17 Apr to 31 Jul

Sow outdoors: 15 May to 3 Jul
Under cover: 17 Apr to 31 Jul
First harvest: About 91 days after sowing. Sown on 15 May, ready around 14 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Runner bean across the UK, town by town

French beanOutdoors 15 May to 24 Jul; Under cover 17 Apr to 21 Aug

Sow outdoors: 15 May to 24 Jul
Under cover: 17 Apr to 21 Aug
First harvest: About 71 days after sowing. Sown on 15 May, ready around 25 July.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

French bean across the UK, town by town

Broad beanOutdoors 2 Oct to 25 Nov; Under cover 4 Sep to 23 Dec

Sow outdoors: 2 Oct to 25 Nov
Under cover: 4 Sep to 23 Dec
First harvest: About 220 days after sowing. Sown on 2 October, ready around 10 May.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Broad bean across the UK, town by town

PeaOutdoors 11 Mar to 16 Jun; Under cover 11 Feb to 14 Jul

Sow outdoors: 11 Mar to 16 Jun
Under cover: 11 Feb to 14 Jul
First harvest: About 85 days after sowing. Sown on 11 March, ready around 4 June.
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 29 Apr; Under cover 5 Feb to 27 May

Plant outdoors: 5 Mar to 29 Apr
Under cover: 5 Feb to 27 May
First harvest: About 146 days after planting. Planted on 5 March, ready around 29 July.
Warmth: Hardy: grows once days average 6°C.

Onion across the UK, town by town

GarlicOutdoors 2 Oct to 7 Dec; Under cover 4 Sep to 4 Jan

Plant outdoors: 2 Oct to 7 Dec
Under cover: 4 Sep to 4 Jan
First harvest: About 250 days after planting. Planted on 2 October, ready around 9 June.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across the UK, town by town

LeekOutdoors 11 Mar to 3 Jul; Under cover 11 Feb to 31 Jul

Sow outdoors: 11 Mar to 3 Jul
Under cover: 11 Feb to 31 Jul
First harvest: About 155 days after sowing. Sown on 11 March, ready around 13 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 77 days after sowing. Sown on 23 February, ready around 11 May.
Warmth: Hardy: grows once days average 5°C.

Spring onion across the UK, town by town

ShallotOutdoors 2 Feb to 29 Apr; Under cover 5 Jan to 27 May

Plant outdoors: 2 Feb to 29 Apr
Under cover: 5 Jan to 27 May
First harvest: About 147 days after planting. Planted on 2 February, ready around 29 June.
Warmth: Hardy: grows once days average 5°C.

Shallot across the UK, town by town

Brassicas

CabbageOutdoors 11 Mar to 24 Jul; Under cover 11 Feb to 21 Aug

Sow outdoors: 11 Mar to 24 Jul
Under cover: 11 Feb to 21 Aug
First harvest: About 115 days after sowing. Sown on 11 March, ready around 4 July.
Warmth: Hardy: grows once days average 6°C.

Cabbage across the UK, town by town

BroccoliOutdoors 29 Mar to 3 Jul; Under cover 1 Mar to 31 Jul

Sow outdoors: 29 Mar to 3 Jul
Under cover: 1 Mar to 31 Jul
First harvest: About 93 days after sowing. Sown on 29 March, ready around 30 June.
Warmth: Hardy: grows once days average 7°C.

Broccoli across the UK, town by town

CauliflowerOutdoors 11 Mar to 16 Jun; Under cover 11 Feb to 14 Jul

Sow outdoors: 11 Mar to 16 Jun
Under cover: 11 Feb to 14 Jul
First harvest: About 126 days after sowing. Sown on 11 March, ready around 15 July.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Cauliflower across the UK, town by town

Brussels sproutOutdoors 11 Mar to 15 May; Under cover 11 Feb to 12 Jun

Sow outdoors: 11 Mar to 15 May
Under cover: 11 Feb to 12 Jun
First harvest: About 183 days after sowing. Sown on 11 March, ready around 10 September.
Warmth: Hardy: grows once days average 6°C.

Brussels sprout across the UK, town by town

KaleOutdoors 29 Mar to 24 Jul; Under cover 1 Mar to 21 Aug

Sow outdoors: 29 Mar to 24 Jul
Under cover: 1 Mar to 21 Aug
First harvest: About 83 days after sowing. Sown on 29 March, ready around 20 June.
Warmth: Hardy: grows once days average 7°C.

Kale across the UK, town by town

Pak choiOutdoors 13 Apr to 4 Sep; Under cover 16 Mar to 2 Oct

Sow outdoors: 13 Apr to 4 Sep
Under cover: 16 Mar to 2 Oct
First harvest: About 47 days after sowing. Sown on 13 April, ready around 30 May.
Warmth: Hardy: grows once days average 8°C; bolts in hot weather.

Pak choi across the UK, town by town

Herbs

BasilOutdoors 13 Apr to 24 Jul; Under cover 16 Mar to 21 Aug

Sow outdoors: 13 Apr to 24 Jul
Under cover: 16 Mar to 21 Aug
First harvest: About 63 days after sowing. Sown on 13 April, ready around 15 June.
Warmth: Tender: needs days averaging 8°C or more, and no frost.

Basil across the UK, town by town

ParsleyOutdoors 11 Mar to 20 Aug; Under cover 11 Feb to 17 Sep

Sow outdoors: 11 Mar to 20 Aug
Under cover: 11 Feb to 17 Sep
First harvest: About 80 days after sowing. Sown on 11 March, ready around 30 May.
Warmth: Hardy: grows once days average 6°C.

Parsley across the UK, town by town

CorianderOutdoors 29 Mar to 5 Sep; Under cover 1 Mar to 3 Oct

Sow outdoors: 29 Mar to 5 Sep
Under cover: 1 Mar to 3 Oct
First harvest: About 52 days after sowing. Sown on 29 March, ready around 20 May.
Warmth: Hardy: grows once days average 7°C; bolts in hot weather.

Coriander across the UK, town by town

ChivesOutdoors 11 Mar to 31 May; Under cover 11 Feb to 28 Jun

Sow outdoors: 11 Mar to 31 May
Under cover: 11 Feb to 28 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 29 Mar to 7 Oct; Under cover 1 Mar to 4 Nov

Sow outdoors: 29 Mar to 7 Oct
Under cover: 1 Mar to 4 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 11 Mar to 15 May; Under cover 11 Feb to 12 Jun

Plant outdoors: 11 Mar to 15 May
Under cover: 11 Feb to 12 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 4 Nov to 20 Jan; Under cover 7 Oct to 17 Feb

Plant outdoors: 4 Nov to 20 Jan
Under cover: 7 Oct to 17 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 17 Oct to 26 Dec; Under cover 19 Sep to 23 Jan

Plant outdoors: 17 Oct to 26 Dec
Under cover: 19 Sep to 23 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

Questions about growing in Cwmbran

When is the last frost in Cwmbran?

On average around 12 April, and the first autumn frost comes around 21 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 Cwmbran?

Yes. Plant them outdoors 21 May to 16 Jun, or under cover 23 Apr to 14 Jul.

What can I sow in Cwmbran 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 Cwmbran. 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