Ontario, Canada

Planting calendar for Cornwall

Last frost around April 26, first frost around October 29: about 186 frost-free days.

Last frost: April 26
First frost: October 29
Frost-free days: 186

Sow now: November

See the whole year

Outdoors

Raspberry
Rhubarb

Under cover

Garlic

The year at a glance

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

Sow outdoorsSow under cover (indoors, a greenhouse or a cold frame)

When to sow each crop in Cornwall, 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
Chile 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
Bell 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
Eggplant	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
Zucchini	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 outdoors and under cover	September: Sow under cover	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
Winter 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
Sweet corn	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
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
Beet	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: Not this month	October: Not this month	November: Not this month	December: Not this month
Parsnip	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
Radish	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
Potato	January: Not this month	February: Not this month	March: Plant under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant outdoors and under cover	July: Plant under cover	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: 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
Leaves
Lettuce	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
Spinach	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
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
Arugula	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
Celery	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
Beans and peas
Runner bean	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 outdoors and under cover	August: Sow under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Green bean	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 outdoors and under cover	August: Sow outdoors and under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Fava bean	January: Not this month	February: Not this month	March: Sow 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
Pea	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
Onion family
Onion	January: Not this month	February: Not this month	March: Plant 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
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 under cover	December: Not this month
Leek	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
Scallion	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
Shallot	January: Not this month	February: Not this month	March: Plant under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant outdoors and under cover	July: Plant under cover	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: 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
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: 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
Brussels sprout	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
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
Bok choy	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 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: 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 outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Parsley	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
Cilantro	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: 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
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: Not this month	March: Plant under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant outdoors and under cover	July: Plant under cover	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Raspberry	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: Not this month	October: Plant outdoors and under cover	November: Plant outdoors and under cover	December: Plant under cover
Rhubarb	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: Not this month

Fruit rows show when to plant, not sow.

Crop by crop

Fruiting

TomatoOutdoors May 31 to Jun 25; Under cover May 3 to Jul 23

Sow outdoors: May 31 to Jun 25
Under cover: May 3 to Jul 23
First harvest: About 66 days after sowing. Sown on May 31, ready around August 5.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Tomato across Canada, town by town

Chile pepperOutdoors May 30 to Jun 25; Under cover May 2 to Jul 23

Sow outdoors: May 30 to Jun 25
Under cover: May 2 to Jul 23
First harvest: About 84 days after sowing. Sown on May 30, ready around August 22.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Chile pepper across Canada, town by town

Bell pepperOutdoors Jun 4 to Jun 30; Under cover May 7 to Jul 28

Sow outdoors: Jun 4 to Jun 30
Under cover: May 7 to Jul 28
First harvest: About 78 days after sowing. Sown on June 4, ready around August 21.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Bell pepper across Canada, town by town

EggplantOutdoors Jun 4 to Jun 25; Under cover May 7 to Jul 23

Sow outdoors: Jun 4 to Jun 25
Under cover: May 7 to Jul 23
First harvest: About 90 days after sowing. Sown on June 4, ready around September 2.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Eggplant across Canada, town by town

ZucchiniOutdoors May 30 to Jul 10, and Jul 25 to Aug 11; Under cover May 2 to Aug 11, and Aug 22 to Sep 8

Sow outdoors: May 30 to Jul 10, and Jul 25 to Aug 11
Under cover: May 2 to Aug 11, and Aug 22 to Sep 8
First harvest: About 42 days after sowing. Sown on May 30, ready around July 11.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Zucchini across Canada, town by town

CucumberOutdoors May 30 to Jul 10, and Jul 25 to Aug 6; Under cover May 2 to Aug 7, and Aug 22 to Sep 3

Sow outdoors: May 30 to Jul 10, and Jul 25 to Aug 6
Under cover: May 2 to Aug 7, and Aug 22 to Sep 3
First harvest: About 47 days after sowing. Sown on May 30, ready around July 16.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Cucumber across Canada, town by town

Winter squashOutdoors May 30 to Jun 30; Under cover May 2 to Jul 28

Sow outdoors: May 30 to Jun 30
Under cover: May 2 to Jul 28
First harvest: About 66 days after sowing. Sown on May 30, ready around August 4.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Winter squash across Canada, town by town

Sweet cornOutdoors May 25 to Jun 30; Under cover Apr 27 to Jul 28

Sow outdoors: May 25 to Jun 30
Under cover: Apr 27 to Jul 28
First harvest: About 61 days after sowing. Sown on May 25, ready around July 25.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Sweet corn across Canada, town by town

Roots

CarrotOutdoors Apr 21 to Jul 30; Under cover Mar 24 to Aug 27

Sow outdoors: Apr 21 to Jul 30
Under cover: Mar 24 to Aug 27
First harvest: About 70 days after sowing. Sown on April 21, ready around June 30.
Warmth: Hardy: grows once days average 7°C.

Carrot across Canada, town by town

BeetOutdoors Apr 21 to Aug 8; Under cover Mar 24 to Sep 5

Sow outdoors: Apr 21 to Aug 8
Under cover: Mar 24 to Sep 5
First harvest: About 49 days after sowing. Sown on April 21, ready around June 9.
Warmth: Hardy: grows once days average 7°C.

Beet across Canada, town by town

ParsnipOutdoors Apr 17 to Jul 3; Under cover Mar 20 to Jul 31

Sow outdoors: Apr 17 to Jul 3
Under cover: Mar 20 to Jul 31
First harvest: About 87 days after sowing. Sown on April 17, ready around July 13.
Warmth: Hardy: grows once days average 6°C.

Parsnip across Canada, town by town

RadishOutdoors Apr 17 to Sep 19; Under cover Mar 20 to Oct 17

Sow outdoors: Apr 17 to Sep 19
Under cover: Mar 20 to Oct 17
First harvest: About 18 days after sowing. Sown on April 17, ready around May 5.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Radish across Canada, town by town

PotatoOutdoors Apr 17 to Jun 12; Under cover Mar 20 to Jul 10

Plant outdoors: Apr 17 to Jun 12
Under cover: Mar 20 to Jul 10
First harvest: About 65 days after planting. Planted on April 17, ready around June 21.
Warmth: Hardy: grows once days average 6°C.

Potato across Canada, town by town

TurnipOutdoors Apr 17 to Aug 21; Under cover Mar 20 to Sep 18

Sow outdoors: Apr 17 to Aug 21
Under cover: Mar 20 to Sep 18
First harvest: About 38 days after sowing. Sown on April 17, ready around May 25.
Warmth: Hardy: grows once days average 6°C.

Turnip across Canada, town by town

Leaves

LettuceOutdoors Apr 18 to Aug 16; Under cover Mar 21 to Sep 13

Sow outdoors: Apr 18 to Aug 16
Under cover: Mar 21 to Sep 13
First harvest: About 46 days after sowing. Sown on April 18, ready around June 3.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Lettuce across Canada, town by town

SpinachOutdoors Apr 17 to Sep 13; Under cover Mar 20 to Oct 11

Sow outdoors: Apr 17 to Sep 13
Under cover: Mar 20 to Oct 11
First harvest: About 29 days after sowing. Sown on April 17, ready around May 16.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Spinach across Canada, town by town

Swiss chardOutdoors Apr 21 to Aug 21; Under cover Mar 24 to Sep 18

Sow outdoors: Apr 21 to Aug 21
Under cover: Mar 24 to Sep 18
First harvest: About 42 days after sowing. Sown on April 21, ready around June 2.
Warmth: Hardy: grows once days average 7°C.

Swiss chard across Canada, town by town

ArugulaOutdoors Apr 17 to Sep 14; Under cover Mar 20 to Oct 12

Sow outdoors: Apr 17 to Sep 14
Under cover: Mar 20 to Oct 12
First harvest: About 26 days after sowing. Sown on April 17, ready around May 13.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Arugula across Canada, town by town

CeleryOutdoors Apr 14 to Jun 13; Under cover Mar 17 to Jul 11

Sow outdoors: Apr 14 to Jun 13
Under cover: Mar 17 to Jul 11
First harvest: About 80 days after sowing. Sown on April 14, ready around July 3.
Warmth: Hardy: grows once days average 5°C.

Celery across Canada, town by town

Beans and peas

Runner beanOutdoors May 25 to Jul 10; Under cover Apr 27 to Aug 7

Sow outdoors: May 25 to Jul 10
Under cover: Apr 27 to Aug 7
First harvest: About 58 days after sowing. Sown on May 25, ready around July 22.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Runner bean across Canada, town by town

Green beanOutdoors May 25 to Aug 8; Under cover Apr 27 to Sep 5

Sow outdoors: May 25 to Aug 8
Under cover: Apr 27 to Sep 5
First harvest: About 50 days after sowing. Sown on May 25, ready around July 14.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Green bean across Canada, town by town

Fava beanOutdoors Apr 12 to Apr 25; Under cover Mar 15 to Mar 28, and Apr 12 to Apr 25, and May 10 to May 23

Sow outdoors: Apr 12 to Apr 25
Under cover: Mar 15 to Mar 28, and Apr 12 to Apr 25, and May 10 to May 23
First harvest: About 220 days after sowing. Sown on April 12, ready around November 18.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Fava bean across Canada, town by town

PeaOutdoors Apr 17 to Jul 31; Under cover Mar 20 to Aug 28

Sow outdoors: Apr 17 to Jul 31
Under cover: Mar 20 to Aug 28
First harvest: About 51 days after sowing. Sown on April 17, ready around June 7.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Pea across Canada, town by town

Onion family

OnionOutdoors Apr 16 to Jun 6; Under cover Mar 19 to Jul 4

Plant outdoors: Apr 16 to Jun 6
Under cover: Mar 19 to Jul 4
First harvest: About 92 days after planting. Planted on April 16, ready around July 17.
Warmth: Hardy: grows once days average 6°C.

Onion across Canada, town by town

GarlicOutdoors Oct 8 to Nov 4; Under cover Sep 10 to Dec 2

Plant outdoors: Oct 8 to Nov 4
Under cover: Sep 10 to Dec 2
First harvest: About 250 days after planting. Planted on October 8, ready around June 15.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across Canada, town by town

LeekOutdoors Apr 17 to Aug 2; Under cover Mar 20 to Aug 30

Sow outdoors: Apr 17 to Aug 2
Under cover: Mar 20 to Aug 30
First harvest: About 101 days after sowing. Sown on April 17, ready around July 27.
Warmth: Hardy: grows once days average 6°C.

Leek across Canada, town by town

ScallionOutdoors Apr 14 to Aug 31; Under cover Mar 17 to Sep 28

Sow outdoors: Apr 14 to Aug 31
Under cover: Mar 17 to Sep 28
First harvest: About 42 days after sowing. Sown on April 14, ready around May 26.
Warmth: Hardy: grows once days average 5°C.

Scallion across Canada, town by town

ShallotOutdoors Apr 12 to Jun 25; Under cover Mar 15 to Jul 23

Plant outdoors: Apr 12 to Jun 25
Under cover: Mar 15 to Jul 23
First harvest: About 78 days after planting. Planted on April 12, ready around June 29.
Warmth: Hardy: grows once days average 5°C.

Shallot across Canada, town by town

Brassicas

CabbageOutdoors Apr 17 to Aug 17; Under cover Mar 20 to Sep 14

Sow outdoors: Apr 17 to Aug 17
Under cover: Mar 20 to Sep 14
First harvest: About 72 days after sowing. Sown on April 17, ready around June 28.
Warmth: Hardy: grows once days average 6°C.

Cabbage across Canada, town by town

BroccoliOutdoors Apr 21 to Jul 25; Under cover Mar 24 to Aug 22

Sow outdoors: Apr 21 to Jul 25
Under cover: Mar 24 to Aug 22
First harvest: About 63 days after sowing. Sown on April 21, ready around June 23.
Warmth: Hardy: grows once days average 7°C.

Broccoli across Canada, town by town

CauliflowerOutdoors Apr 17 to Jul 18; Under cover Mar 20 to Aug 15

Sow outdoors: Apr 17 to Jul 18
Under cover: Mar 20 to Aug 15
First harvest: About 80 days after sowing. Sown on April 17, ready around July 6.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Cauliflower across Canada, town by town

Brussels sproutOutdoors Apr 17 to Jun 17; Under cover Mar 20 to Jul 15

Sow outdoors: Apr 17 to Jun 17
Under cover: Mar 20 to Jul 15
First harvest: About 121 days after sowing. Sown on April 17, ready around August 16.
Warmth: Hardy: grows once days average 6°C.

Brussels sprout across Canada, town by town

KaleOutdoors Apr 21 to Aug 4; Under cover Mar 24 to Sep 1

Sow outdoors: Apr 21 to Aug 4
Under cover: Mar 24 to Sep 1
First harvest: About 56 days after sowing. Sown on April 21, ready around June 16.
Warmth: Hardy: grows once days average 7°C.

Kale across Canada, town by town

Bok choyOutdoors Apr 26 to Sep 4; Under cover Mar 29 to Oct 2

Sow outdoors: Apr 26 to Sep 4
Under cover: Mar 29 to Oct 2
First harvest: About 35 days after sowing. Sown on April 26, ready around May 31.
Warmth: Hardy: grows once days average 8°C; bolts in hot weather.

Bok choy across Canada, town by town

Herbs

BasilOutdoors Apr 26 to Aug 12; Under cover Mar 29 to Sep 9

Sow outdoors: Apr 26 to Aug 12
Under cover: Mar 29 to Sep 9
First harvest: About 36 days after sowing. Sown on April 26, ready around June 1.
Warmth: Tender: needs days averaging 8°C or more, and no frost.

Basil across Canada, town by town

ParsleyOutdoors Apr 17 to Aug 19; Under cover Mar 20 to Sep 16

Sow outdoors: Apr 17 to Aug 19
Under cover: Mar 20 to Sep 16
First harvest: About 48 days after sowing. Sown on April 17, ready around June 4.
Warmth: Hardy: grows once days average 6°C.

Parsley across Canada, town by town

CilantroOutdoors Apr 21 to Sep 3; Under cover Mar 24 to Oct 1

Sow outdoors: Apr 21 to Sep 3
Under cover: Mar 24 to Oct 1
First harvest: About 35 days after sowing. Sown on April 21, ready around May 26.
Warmth: Hardy: grows once days average 7°C; bolts in hot weather.

Cilantro across Canada, town by town

ChivesOutdoors Apr 17 to Jul 3, and Jul 25 to Aug 2; Under cover Mar 20 to Aug 2, and Aug 22 to Aug 30

Sow outdoors: Apr 17 to Jul 3, and Jul 25 to Aug 2
Under cover: Mar 20 to Aug 2, and Aug 22 to Aug 30
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 6°C.

Chives across Canada, town by town

MintOutdoors Apr 21 to Sep 23; Under cover Mar 24 to Oct 21

Sow outdoors: Apr 21 to Sep 23
Under cover: Mar 24 to Oct 21
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 7°C.

Mint across Canada, town by town

Fruit

StrawberryOutdoors Apr 17 to Jun 17; Under cover Mar 20 to Jul 15

Plant outdoors: Apr 17 to Jun 17
Under cover: Mar 20 to Jul 15
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 6°C.

Strawberry across Canada, town by town

RaspberryOutdoors Oct 24 to Nov 10; Under cover Sep 26 to Oct 13, and Oct 24 to Nov 10, and Nov 21 to Dec 8

Plant outdoors: Oct 24 to Nov 10
Under cover: Sep 26 to Oct 13, and Oct 24 to Nov 10, and Nov 21 to Dec 8
First harvest: Crops every year once it’s established.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Raspberry across Canada, town by town

RhubarbOutdoors Oct 15 to Nov 8; Under cover Sep 17 to Dec 6

Plant outdoors: Oct 15 to Nov 8
Under cover: Sep 17 to Dec 6
First harvest: Crops every year once it’s established.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Rhubarb across Canada, town by town

Nearby

Questions about growing in Cornwall

When is the last frost in Cornwall?

On average around April 26, and the first autumn frost comes around October 29. 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 Cornwall?

Yes. Plant them outdoors May 31 to Jun 25, or under cover May 3 to Jul 23.

What can I sow in Cornwall in November?

Outdoors: raspberry, rhubarb. Under cover: garlic.

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 backyard or community garden plot in Cornwall. 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