Northern Ireland, UK

Planting calendar for Belfast

Last frost around 5 March, first frost around 20 December: about 290 frost-free days.

Last frost: 5 March
First frost: 20 December
Frost-free days: 290

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 Belfast. 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 Belfast, 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 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: 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
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: Not this month	May: Sow 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: Not this month	May: Sow 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: 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
Sweetcorn	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
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 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
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 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
Beans and peas
Runner bean	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 outdoors and 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: Not this month	May: Sow 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 outdoors and 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 outdoors and under cover	August: Sow under cover	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 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
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 outdoors and 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 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: Not this month	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 outdoors and under cover	August: Sow under cover	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 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
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 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: 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 3 Jun to 23 Jun; Under cover 6 May to 21 Jul

Sow outdoors: 3 Jun to 23 Jun
Under cover: 6 May to 21 Jul
First harvest: About 176 days after sowing. Sown on 3 June, ready around 26 November.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Tomato across the UK, town by town

ChilliOutdoors 2 Jun to 18 Jun; Under cover 5 May to 21 May, and 2 Jun to 18 Jun, and 30 Jun to 16 Jul

Sow outdoors: 2 Jun to 18 Jun
Under cover: 5 May to 21 May, and 2 Jun to 18 Jun, and 30 Jun to 16 Jul
First harvest: About 224 days after sowing. Sown on 2 June, ready around 12 January.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Chilli across the UK, town by town

Sweet pepperOutdoors 8 Jun to 23 Jun; Under cover 11 May to 26 May, and 8 Jun to 23 Jun, and 6 Jul to 21 Jul

Sow outdoors: 8 Jun to 23 Jun
Under cover: 11 May to 26 May, and 8 Jun to 23 Jun, and 6 Jul to 21 Jul
First harvest: About 208 days after sowing. Sown on 8 June, ready around 2 January.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Sweet pepper across the UK, town by town

AubergineOutdoors 8 Jun to 18 Jun; Under cover 11 May to 21 May, and 8 Jun to 18 Jun, and 6 Jul to 16 Jul

Sow outdoors: 8 Jun to 18 Jun
Under cover: 11 May to 21 May, and 8 Jun to 18 Jun, and 6 Jul to 16 Jul
First harvest: About 240 days after sowing. Sown on 8 June, ready around 3 February.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Aubergine across the UK, town by town

CourgetteOutdoors 2 Jun to 29 Jul; Under cover 5 May to 26 Aug

Sow outdoors: 2 Jun to 29 Jul
Under cover: 5 May to 26 Aug
First harvest: About 67 days after sowing. Sown on 2 June, ready around 8 August.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Courgette across the UK, town by town

CucumberOutdoors 2 Jun to 21 Jul; Under cover 5 May to 18 Aug

Sow outdoors: 2 Jun to 21 Jul
Under cover: 5 May to 18 Aug
First harvest: About 80 days after sowing. Sown on 2 June, ready around 21 August.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Cucumber across the UK, town by town

SquashOutdoors 2 Jun to 25 Jun; Under cover 5 May to 23 Jul

Sow outdoors: 2 Jun to 25 Jun
Under cover: 5 May to 23 Jul
First harvest: About 176 days after sowing. Sown on 2 June, ready around 25 November.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Squash across the UK, town by town

SweetcornOutdoors 27 May to 30 Jun; Under cover 29 Apr to 28 Jul

Sow outdoors: 27 May to 30 Jun
Under cover: 29 Apr to 28 Jul
First harvest: About 121 days after sowing. Sown on 27 May, ready around 25 September.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Sweetcorn across the UK, town by town

Roots

CarrotOutdoors 3 Apr to 2 Aug; Under cover 6 Mar to 30 Aug

Sow outdoors: 3 Apr to 2 Aug
Under cover: 6 Mar to 30 Aug
First harvest: About 110 days after sowing. Sown on 3 April, ready around 22 July.
Warmth: Hardy: grows once days average 7°C.

Carrot across the UK, town by town

BeetrootOutdoors 3 Apr to 2 Aug; Under cover 6 Mar to 30 Aug

Sow outdoors: 3 Apr to 2 Aug
Under cover: 6 Mar to 30 Aug
First harvest: About 77 days after sowing. Sown on 3 April, ready around 19 June.
Warmth: Hardy: grows once days average 7°C.

Beetroot across the UK, town by town

ParsnipOutdoors 12 Mar to 16 Jun; Under cover 12 Feb to 14 Jul

Sow outdoors: 12 Mar to 16 Jun
Under cover: 12 Feb to 14 Jul
First harvest: About 147 days after sowing. Sown on 12 March, ready around 6 August.
Warmth: Hardy: grows once days average 6°C.

Parsnip across the UK, town by town

RadishOutdoors 12 Mar to 17 Sep; Under cover 12 Feb to 15 Oct

Sow outdoors: 12 Mar to 17 Sep
Under cover: 12 Feb to 15 Oct
First harvest: About 32 days after sowing. Sown on 12 March, ready around 13 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Radish across the UK, town by town

PotatoOutdoors 12 Mar to 21 May; Under cover 12 Feb to 18 Jun

Plant outdoors: 12 Mar to 21 May
Under cover: 12 Feb to 18 Jun
First harvest: About 114 days after planting. Planted on 12 March, ready around 4 July.
Warmth: Hardy: grows once days average 6°C.

Potato across the UK, town by town

TurnipOutdoors 12 Mar to 15 Aug; Under cover 12 Feb to 12 Sep

Sow outdoors: 12 Mar to 15 Aug
Under cover: 12 Feb to 12 Sep
First harvest: About 69 days after sowing. Sown on 12 March, ready around 20 May.
Warmth: Hardy: grows once days average 6°C.

Turnip across the UK, town by town

Leaves

LettuceOutdoors 19 Mar to 11 Aug; Under cover 19 Feb to 8 Sep

Sow outdoors: 19 Mar to 11 Aug
Under cover: 19 Feb to 8 Sep
First harvest: About 80 days after sowing. Sown on 19 March, ready around 7 June.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Lettuce across the UK, town by town

SpinachOutdoors 12 Mar to 20 Sep; Under cover 12 Feb to 18 Oct

Sow outdoors: 12 Mar to 20 Sep
Under cover: 12 Feb to 18 Oct
First harvest: About 52 days after sowing. Sown on 12 March, ready around 3 May.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Spinach across the UK, town by town

Swiss chardOutdoors 3 Apr to 15 Aug; Under cover 6 Mar to 12 Sep

Sow outdoors: 3 Apr to 15 Aug
Under cover: 6 Mar to 12 Sep
First harvest: About 66 days after sowing. Sown on 3 April, ready around 8 June.
Warmth: Hardy: grows once days average 7°C.

Swiss chard across the UK, town by town

RocketOutdoors 12 Mar to 19 Sep; Under cover 12 Feb to 17 Oct

Sow outdoors: 12 Mar to 19 Sep
Under cover: 12 Feb to 17 Oct
First harvest: About 46 days after sowing. Sown on 12 March, ready around 27 April.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Rocket across the UK, town by town

CeleryOutdoors 17 Feb to 9 May; Under cover 20 Jan to 6 Jun

Sow outdoors: 17 Feb to 9 May
Under cover: 20 Jan to 6 Jun
First harvest: About 156 days after sowing. Sown on 17 February, ready around 23 July.
Warmth: Hardy: grows once days average 5°C.

Celery across the UK, town by town

Beans and peas

Runner beanOutdoors 27 May to 9 Jul; Under cover 29 Apr to 6 Aug

Sow outdoors: 27 May to 9 Jul
Under cover: 29 Apr to 6 Aug
First harvest: About 105 days after sowing. Sown on 27 May, ready around 9 September.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Runner bean across the UK, town by town

French beanOutdoors 27 May to 26 Jul; Under cover 29 Apr to 23 Aug

Sow outdoors: 27 May to 26 Jul
Under cover: 29 Apr to 23 Aug
First harvest: About 79 days after sowing. Sown on 27 May, ready around 14 August.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

French bean across the UK, town by town

Broad beanOutdoors 24 Sep to 27 Nov; Under cover 27 Aug to 25 Dec

Sow outdoors: 24 Sep to 27 Nov
Under cover: 27 Aug to 25 Dec
First harvest: About 220 days after sowing. Sown on 24 September, ready around 2 May.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Broad bean across the UK, town by town

PeaOutdoors 12 Mar to 10 Jul; Under cover 12 Feb to 7 Aug

Sow outdoors: 12 Mar to 10 Jul
Under cover: 12 Feb to 7 Aug
First harvest: About 92 days after sowing. Sown on 12 March, ready around 12 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 9 May; Under cover 4 Feb to 6 Jun

Plant outdoors: 4 Mar to 9 May
Under cover: 4 Feb to 6 Jun
First harvest: About 162 days after planting. Planted on 4 March, ready around 13 August.
Warmth: Hardy: grows once days average 6°C.

Onion across the UK, town by town

GarlicOutdoors 24 Sep to 11 Dec; Under cover 27 Aug to 8 Jan

Plant outdoors: 24 Sep to 11 Dec
Under cover: 27 Aug to 8 Jan
First harvest: About 250 days after planting. Planted on 24 September, ready around 1 June.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across the UK, town by town

LeekOutdoors 12 Mar to 2 Aug; Under cover 12 Feb to 30 Aug

Sow outdoors: 12 Mar to 2 Aug
Under cover: 12 Feb to 30 Aug
First harvest: About 170 days after sowing. Sown on 12 March, ready around 29 August.
Warmth: Hardy: grows once days average 6°C.

Leek across the UK, town by town

Spring onionOutdoors 17 Feb to 6 Sep; Under cover 20 Jan to 4 Oct

Sow outdoors: 17 Feb to 6 Sep
Under cover: 20 Jan to 4 Oct
First harvest: About 88 days after sowing. Sown on 17 February, ready around 16 May.
Warmth: Hardy: grows once days average 5°C.

Spring onion across the UK, town by town

ShallotOutdoors 23 Jan to 7 Apr; Under cover 26 Dec to 5 May

Plant outdoors: 23 Jan to 7 Apr
Under cover: 26 Dec to 5 May
First harvest: About 78 days after planting. Planted on 23 January, ready around 11 April.
Warmth: Hardy: grows once days average 5°C.

Shallot across the UK, town by town

Brassicas

CabbageOutdoors 12 Mar to 2 Aug; Under cover 12 Feb to 30 Aug

Sow outdoors: 12 Mar to 2 Aug
Under cover: 12 Feb to 30 Aug
First harvest: About 125 days after sowing. Sown on 12 March, ready around 15 July.
Warmth: Hardy: grows once days average 6°C.

Cabbage across the UK, town by town

BroccoliOutdoors 3 Apr to 2 Aug; Under cover 6 Mar to 30 Aug

Sow outdoors: 3 Apr to 2 Aug
Under cover: 6 Mar to 30 Aug
First harvest: About 99 days after sowing. Sown on 3 April, ready around 11 July.
Warmth: Hardy: grows once days average 7°C.

Broccoli across the UK, town by town

CauliflowerOutdoors 12 Mar to 10 Jul; Under cover 12 Feb to 7 Aug

Sow outdoors: 12 Mar to 10 Jul
Under cover: 12 Feb to 7 Aug
First harvest: About 136 days after sowing. Sown on 12 March, ready around 26 July.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Cauliflower across the UK, town by town

Brussels sproutOutdoors 12 Mar to 27 May; Under cover 12 Feb to 24 Jun

Sow outdoors: 12 Mar to 27 May
Under cover: 12 Feb to 24 Jun
First harvest: About 203 days after sowing. Sown on 12 March, ready around 1 October.
Warmth: Hardy: grows once days average 6°C.

Brussels sprout across the UK, town by town

KaleOutdoors 3 Apr to 2 Aug; Under cover 6 Mar to 30 Aug

Sow outdoors: 3 Apr to 2 Aug
Under cover: 6 Mar to 30 Aug
First harvest: About 88 days after sowing. Sown on 3 April, ready around 30 June.
Warmth: Hardy: grows once days average 7°C.

Kale across the UK, town by town

Pak choiOutdoors 21 Apr to 1 Sep; Under cover 24 Mar to 29 Sep

Sow outdoors: 21 Apr to 1 Sep
Under cover: 24 Mar to 29 Sep
First harvest: About 49 days after sowing. Sown on 21 April, ready around 9 June.
Warmth: Hardy: grows once days average 8°C; bolts in hot weather.

Pak choi across the UK, town by town

Herbs

BasilOutdoors 21 Apr to 31 Jul; Under cover 24 Mar to 28 Aug

Sow outdoors: 21 Apr to 31 Jul
Under cover: 24 Mar to 28 Aug
First harvest: About 70 days after sowing. Sown on 21 April, ready around 30 June.
Warmth: Tender: needs days averaging 8°C or more, and no frost.

Basil across the UK, town by town

ParsleyOutdoors 12 Mar to 18 Aug; Under cover 12 Feb to 15 Sep

Sow outdoors: 12 Mar to 18 Aug
Under cover: 12 Feb to 15 Sep
First harvest: About 86 days after sowing. Sown on 12 March, ready around 6 June.
Warmth: Hardy: grows once days average 6°C.

Parsley across the UK, town by town

CorianderOutdoors 3 Apr to 2 Sep; Under cover 6 Mar to 30 Sep

Sow outdoors: 3 Apr to 2 Sep
Under cover: 6 Mar to 30 Sep
First harvest: About 55 days after sowing. Sown on 3 April, ready around 28 May.
Warmth: Hardy: grows once days average 7°C; bolts in hot weather.

Coriander across the UK, town by town

ChivesOutdoors 12 Mar to 16 Jun; Under cover 12 Feb to 14 Jul

Sow outdoors: 12 Mar to 16 Jun
Under cover: 12 Feb to 14 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 3 Apr to 14 Oct; Under cover 6 Mar to 11 Nov

Sow outdoors: 3 Apr to 14 Oct
Under cover: 6 Mar to 11 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 12 Mar to 27 May; Under cover 12 Feb to 24 Jun

Plant outdoors: 12 Mar to 27 May
Under cover: 12 Feb to 24 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 2 Nov to 23 Jan; Under cover 5 Oct to 20 Feb

Plant outdoors: 2 Nov to 23 Jan
Under cover: 5 Oct to 20 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 12 Oct to 11 Jan; Under cover 14 Sep to 8 Feb

Plant outdoors: 12 Oct to 11 Jan
Under cover: 14 Sep to 8 Feb
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 Belfast

When is the last frost in Belfast?

On average around 5 March, and the first autumn frost comes around 20 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 Belfast?

Yes. Plant them outdoors 3 Jun to 23 Jun, or under cover 6 May to 21 Jul.

What can I sow in Belfast 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 Belfast. 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