Wales, UK

Planting calendar for Colwyn Bay

Last frost around 27 March, first frost around 4 December: about 252 frost-free days.

Last frost: 27 March
First frost: 4 December
Frost-free days: 252

Sow now: November

See the whole year

Outdoors

Broad bean
Garlic
Raspberry
Rhubarb

Under cover

Mint

The year at a glance

When each crop can be sown in Colwyn Bay. 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 Colwyn Bay, 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: 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
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 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 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 outdoors and under cover	August: Sow under cover	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 outdoors and under cover	August: Sow under cover	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: 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
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: Sow under cover	February: Sow outdoors and 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 outdoors and under cover	August: Sow under cover	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: 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
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 outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Spring onion	January: Sow under cover	February: Sow outdoors and 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: Not this month	November: Not this month	December: Not this month
Shallot	January: Plant outdoors and 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 outdoors and under cover	August: Sow under cover	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: Sow under cover	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 23 May to 20 Jun; Under cover 25 Apr to 18 Jul

Sow outdoors: 23 May to 20 Jun
Under cover: 25 Apr to 18 Jul
First harvest: About 112 days after sowing. Sown on 23 May, ready around 12 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Tomato across the UK, town by town

ChilliOutdoors 22 May to 20 Jun; Under cover 24 Apr to 18 Jul

Sow outdoors: 22 May to 20 Jun
Under cover: 24 Apr to 18 Jul
First harvest: About 133 days after sowing. Sown on 22 May, ready around 2 October.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Chilli across the UK, town by town

Sweet pepperOutdoors 27 May to 27 Jun; Under cover 29 Apr to 25 Jul

Sow outdoors: 27 May to 27 Jun
Under cover: 29 Apr to 25 Jul
First harvest: About 126 days after sowing. Sown on 27 May, ready around 30 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Sweet pepper across the UK, town by town

AubergineOutdoors 27 May to 20 Jun; Under cover 29 Apr to 18 Jul

Sow outdoors: 27 May to 20 Jun
Under cover: 29 Apr to 18 Jul
First harvest: About 129 days after sowing. Sown on 27 May, ready around 3 October.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Aubergine across the UK, town by town

CourgetteOutdoors 22 May to 11 Jul; Under cover 24 Apr to 8 Aug

Sow outdoors: 22 May to 11 Jul
Under cover: 24 Apr to 8 Aug
First harvest: About 62 days after sowing. Sown on 22 May, ready around 23 July.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Courgette across the UK, town by town

CucumberOutdoors 22 May to 11 Jul; Under cover 24 Apr to 8 Aug

Sow outdoors: 22 May to 11 Jul
Under cover: 24 Apr to 8 Aug
First harvest: About 73 days after sowing. Sown on 22 May, ready around 3 August.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Cucumber across the UK, town by town

SquashOutdoors 22 May to 27 Jun; Under cover 24 Apr to 25 Jul

Sow outdoors: 22 May to 27 Jun
Under cover: 24 Apr to 25 Jul
First harvest: About 112 days after sowing. Sown on 22 May, ready around 11 September.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Squash across the UK, town by town

SweetcornOutdoors 16 May to 27 Jun; Under cover 18 Apr to 25 Jul

Sow outdoors: 16 May to 27 Jun
Under cover: 18 Apr to 25 Jul
First harvest: About 103 days after sowing. Sown on 16 May, ready around 27 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Sweetcorn across the UK, town by town

Roots

CarrotOutdoors 30 Mar to 31 Jul; Under cover 2 Mar to 28 Aug

Sow outdoors: 30 Mar to 31 Jul
Under cover: 2 Mar to 28 Aug
First harvest: About 105 days after sowing. Sown on 30 March, ready around 13 July.
Warmth: Hardy: grows once days average 7°C.

Carrot across the UK, town by town

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

Sow outdoors: 30 Mar to 2 Aug
Under cover: 2 Mar to 30 Aug
First harvest: About 74 days after sowing. Sown on 30 March, ready around 12 June.
Warmth: Hardy: grows once days average 7°C.

Beetroot across the UK, town by town

ParsnipOutdoors 10 Mar to 3 Jun; Under cover 10 Feb to 1 Jul

Sow outdoors: 10 Mar to 3 Jun
Under cover: 10 Feb to 1 Jul
First harvest: About 138 days after sowing. Sown on 10 March, ready around 26 July.
Warmth: Hardy: grows once days average 6°C.

Parsnip across the UK, town by town

RadishOutdoors 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 31 days after sowing. Sown on 10 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 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: About 107 days after planting. Planted on 10 March, ready around 25 June.
Warmth: Hardy: grows once days average 6°C.

Potato across the UK, town by town

TurnipOutdoors 10 Mar to 20 Aug; Under cover 10 Feb to 17 Sep

Sow outdoors: 10 Mar to 20 Aug
Under cover: 10 Feb to 17 Sep
First harvest: About 65 days after sowing. Sown on 10 March, ready around 14 May.
Warmth: Hardy: grows once days average 6°C.

Turnip across the UK, town by town

Leaves

LettuceOutdoors 16 Mar to 16 Aug; Under cover 16 Feb to 13 Sep

Sow outdoors: 16 Mar to 16 Aug
Under cover: 16 Feb to 13 Sep
First harvest: About 75 days after sowing. Sown on 16 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 10 Mar to 22 Sep; Under cover 10 Feb to 20 Oct

Sow outdoors: 10 Mar to 22 Sep
Under cover: 10 Feb to 20 Oct
First harvest: About 49 days after sowing. Sown on 10 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 30 Mar to 20 Aug; Under cover 2 Mar to 17 Sep

Sow outdoors: 30 Mar to 20 Aug
Under cover: 2 Mar to 17 Sep
First harvest: About 64 days after sowing. Sown on 30 March, ready around 2 June.
Warmth: Hardy: grows once days average 7°C.

Swiss chard across the UK, town by town

RocketOutdoors 10 Mar to 22 Sep; Under cover 10 Feb to 20 Oct

Sow outdoors: 10 Mar to 22 Sep
Under cover: 10 Feb to 20 Oct
First harvest: About 44 days after sowing. Sown on 10 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 20 Feb to 30 Apr; Under cover 23 Jan to 28 May

Sow outdoors: 20 Feb to 30 Apr
Under cover: 23 Jan to 28 May
First harvest: About 143 days after sowing. Sown on 20 February, ready around 13 July.
Warmth: Hardy: grows once days average 5°C.

Celery across the UK, town by town

Beans and peas

Runner beanOutdoors 16 May to 11 Jul; Under cover 18 Apr to 8 Aug

Sow outdoors: 16 May to 11 Jul
Under cover: 18 Apr to 8 Aug
First harvest: About 93 days after sowing. Sown on 16 May, ready around 17 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Runner bean across the UK, town by town

French beanOutdoors 16 May to 31 Jul; Under cover 18 Apr to 28 Aug

Sow outdoors: 16 May to 31 Jul
Under cover: 18 Apr to 28 Aug
First harvest: About 73 days after sowing. Sown on 16 May, ready around 28 July.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

French bean across the UK, town by town

Broad beanOutdoors 1 Oct to 28 Nov; Under cover 3 Sep to 26 Dec

Sow outdoors: 1 Oct to 28 Nov
Under cover: 3 Sep to 26 Dec
First harvest: About 220 days after sowing. Sown on 1 October, ready around 9 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 20 Jun; Under cover 10 Feb to 18 Jul

Sow outdoors: 10 Mar to 20 Jun
Under cover: 10 Feb to 18 Jul
First harvest: About 86 days after sowing. Sown on 10 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 4 Mar to 30 Apr; Under cover 4 Feb to 28 May

Plant outdoors: 4 Mar to 30 Apr
Under cover: 4 Feb to 28 May
First harvest: About 150 days after planting. Planted on 4 March, ready around 1 August.
Warmth: Hardy: grows once days average 6°C.

Onion across the UK, town by town

GarlicOutdoors 1 Oct to 11 Dec; Under cover 3 Sep to 8 Jan

Plant outdoors: 1 Oct to 11 Dec
Under cover: 3 Sep to 8 Jan
First harvest: About 250 days after planting. Planted on 1 October, ready around 8 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 11 Jul; Under cover 10 Feb to 8 Aug

Sow outdoors: 10 Mar to 11 Jul
Under cover: 10 Feb to 8 Aug
First harvest: About 158 days after sowing. Sown on 10 March, ready around 15 August.
Warmth: Hardy: grows once days average 6°C.

Leek across the UK, town by town

Spring onionOutdoors 20 Feb to 8 Sep; Under cover 23 Jan to 6 Oct

Sow outdoors: 20 Feb to 8 Sep
Under cover: 23 Jan to 6 Oct
First harvest: About 80 days after sowing. Sown on 20 February, ready around 11 May.
Warmth: Hardy: grows once days average 5°C.

Spring onion across the UK, town by town

ShallotOutdoors 23 Jan to 30 Apr; Under cover 26 Dec to 28 May

Plant outdoors: 23 Jan to 30 Apr
Under cover: 26 Dec to 28 May
First harvest: About 163 days after planting. Planted on 23 January, ready around 5 July.
Warmth: Hardy: grows once days average 5°C.

Shallot across the UK, town by town

Brassicas

CabbageOutdoors 10 Mar to 31 Jul; Under cover 10 Feb to 28 Aug

Sow outdoors: 10 Mar to 31 Jul
Under cover: 10 Feb to 28 Aug
First harvest: About 118 days after sowing. Sown on 10 March, ready around 6 July.
Warmth: Hardy: grows once days average 6°C.

Cabbage across the UK, town by town

BroccoliOutdoors 30 Mar to 11 Jul; Under cover 2 Mar to 8 Aug

Sow outdoors: 30 Mar to 11 Jul
Under cover: 2 Mar to 8 Aug
First harvest: About 95 days after sowing. Sown on 30 March, ready around 3 July.
Warmth: Hardy: grows once days average 7°C.

Broccoli across the UK, town by town

CauliflowerOutdoors 10 Mar to 20 Jun; Under cover 10 Feb to 18 Jul

Sow outdoors: 10 Mar to 20 Jun
Under cover: 10 Feb to 18 Jul
First harvest: About 128 days after sowing. Sown on 10 March, ready around 16 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 16 May; Under cover 10 Feb to 13 Jun

Sow outdoors: 10 Mar to 16 May
Under cover: 10 Feb to 13 Jun
First harvest: About 187 days after sowing. Sown on 10 March, ready around 13 September.
Warmth: Hardy: grows once days average 6°C.

Brussels sprout across the UK, town by town

KaleOutdoors 30 Mar to 31 Jul; Under cover 2 Mar to 28 Aug

Sow outdoors: 30 Mar to 31 Jul
Under cover: 2 Mar to 28 Aug
First harvest: About 85 days after sowing. Sown on 30 March, ready around 23 June.
Warmth: Hardy: grows once days average 7°C.

Kale across the UK, town by town

Pak choiOutdoors 14 Apr to 5 Sep; Under cover 17 Mar to 3 Oct

Sow outdoors: 14 Apr to 5 Sep
Under cover: 17 Mar to 3 Oct
First harvest: About 47 days after sowing. Sown on 14 April, ready around 31 May.
Warmth: Hardy: grows once days average 8°C; bolts in hot weather.

Pak choi across the UK, town by town

Herbs

BasilOutdoors 14 Apr to 31 Jul; Under cover 17 Mar to 28 Aug

Sow outdoors: 14 Apr to 31 Jul
Under cover: 17 Mar to 28 Aug
First harvest: About 65 days after sowing. Sown on 14 April, ready around 18 June.
Warmth: Tender: needs days averaging 8°C or more, and no frost.

Basil across the UK, town by town

ParsleyOutdoors 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 81 days after sowing. Sown on 10 March, ready around 30 May.
Warmth: Hardy: grows once days average 6°C.

Parsley across the UK, town by town

CorianderOutdoors 30 Mar to 6 Sep; Under cover 2 Mar to 4 Oct

Sow outdoors: 30 Mar to 6 Sep
Under cover: 2 Mar to 4 Oct
First harvest: About 53 days after sowing. Sown on 30 March, ready around 22 May.
Warmth: Hardy: grows once days average 7°C; bolts in hot weather.

Coriander across the UK, town by town

ChivesOutdoors 10 Mar to 3 Jun; Under cover 10 Feb to 1 Jul

Sow outdoors: 10 Mar to 3 Jun
Under cover: 10 Feb to 1 Jul
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 30 Mar to 12 Oct; Under cover 2 Mar to 9 Nov

Sow outdoors: 30 Mar to 12 Oct
Under cover: 2 Mar to 9 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 16 May; Under cover 10 Feb to 13 Jun

Plant outdoors: 10 Mar to 16 May
Under cover: 10 Feb to 13 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 22 Jan; Under cover 8 Oct to 19 Feb

Plant outdoors: 5 Nov to 22 Jan
Under cover: 8 Oct to 19 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 3 Jan; Under cover 19 Sep to 31 Jan

Plant outdoors: 17 Oct to 3 Jan
Under cover: 19 Sep to 31 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 Colwyn Bay

When is the last frost in Colwyn Bay?

On average around 27 March, and the first autumn frost comes around 4 December. 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 Colwyn Bay?

Yes. Plant them outdoors 23 May to 20 Jun, or under cover 25 Apr to 18 Jul.

What can I sow in Colwyn Bay in November?

Outdoors: broad bean, garlic, raspberry, rhubarb. Under cover: mint.

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 Colwyn Bay. 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