Ontario, Canada

Planting calendar for Oshawa

Last frost around April 21, first frost around November 4: about 197 frost-free days.

Last frost: April 21
First frost: November 4
Frost-free days: 197

Sow now: November

See the whole year

Outdoors

Garlic
Raspberry
Rhubarb

Under cover

Nothing this month.

The year at a glance

When each crop can be sown in Oshawa. 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 Oshawa, 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 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
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 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
Cucumber	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: Sow under cover	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 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 corn	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
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: Sow under cover	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: 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
Green 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 outdoors and under cover	September: Sow under cover	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 outdoors and 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 outdoors and under cover	December: Plant under cover
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 outdoors and under cover	September: Sow under cover	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 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
Herbs
Basil	January: Not this month	February: Not this month	March: Not this month	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
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 outdoors and 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 under cover	August: Sow outdoors and 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: Plant under cover	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 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: Plant under cover

Fruit rows show when to plant, not sow.

Crop by crop

Fruiting

TomatoOutdoors May 26 to Jun 20; Under cover Apr 28 to Jul 18

Sow outdoors: May 26 to Jun 20
Under cover: Apr 28 to Jul 18
First harvest: About 66 days after sowing. Sown on May 26, ready around July 31.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Tomato across Canada, town by town

Chile pepperOutdoors May 25 to Jun 20; Under cover Apr 27 to Jul 18

Sow outdoors: May 25 to Jun 20
Under cover: Apr 27 to Jul 18
First harvest: About 84 days after sowing. Sown on May 25, ready around August 17.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Chile pepper across Canada, town by town

Bell 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 78 days after sowing. Sown on May 30, ready around August 16.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Bell pepper across Canada, town by town

EggplantOutdoors May 30 to Jun 20; Under cover May 2 to Jul 18

Sow outdoors: May 30 to Jun 20
Under cover: May 2 to Jul 18
First harvest: About 90 days after sowing. Sown on May 30, ready around August 28.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Eggplant across Canada, town by town

ZucchiniOutdoors May 25 to Jul 5, and Jul 27 to Aug 18; Under cover Apr 27 to Sep 15

Sow outdoors: May 25 to Jul 5, and Jul 27 to Aug 18
Under cover: Apr 27 to Sep 15
First harvest: About 42 days after sowing. Sown on May 25, ready around July 6.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Zucchini across Canada, town by town

CucumberOutdoors May 25 to Jul 5, and Jul 27 to Aug 13; Under cover Apr 27 to Aug 13, and Aug 24 to Sep 10

Sow outdoors: May 25 to Jul 5, and Jul 27 to Aug 13
Under cover: Apr 27 to Aug 13, and Aug 24 to Sep 10
First harvest: About 47 days after sowing. Sown on May 25, ready around July 11.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Cucumber across Canada, town by town

Winter squashOutdoors May 25 to Jun 25; Under cover Apr 27 to Jul 23

Sow outdoors: May 25 to Jun 25
Under cover: Apr 27 to Jul 23
First harvest: About 66 days after sowing. Sown on May 25, ready around July 30.
Warmth: Tender: needs days averaging 12°C or more, and no frost.

Winter squash across Canada, town by town

Sweet cornOutdoors May 20 to Jun 25; Under cover Apr 22 to Jul 23

Sow outdoors: May 20 to Jun 25
Under cover: Apr 22 to Jul 23
First harvest: About 61 days after sowing. Sown on May 20, ready around July 20.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Sweet corn across Canada, town by town

Roots

CarrotOutdoors Apr 19 to Jul 31; Under cover Mar 22 to Aug 28

Sow outdoors: Apr 19 to Jul 31
Under cover: Mar 22 to Aug 28
First harvest: About 70 days after sowing. Sown on April 19, ready around June 28.
Warmth: Hardy: grows once days average 7°C.

Carrot across Canada, town by town

BeetOutdoors Apr 19 to Aug 15; Under cover Mar 22 to Sep 12

Sow outdoors: Apr 19 to Aug 15
Under cover: Mar 22 to Sep 12
First harvest: About 49 days after sowing. Sown on April 19, ready around June 7.
Warmth: Hardy: grows once days average 7°C.

Beet across Canada, town by town

ParsnipOutdoors Apr 14 to Jun 30; Under cover Mar 17 to Jul 28

Sow outdoors: Apr 14 to Jun 30
Under cover: Mar 17 to Jul 28
First harvest: About 86 days after sowing. Sown on April 14, ready around July 9.
Warmth: Hardy: grows once days average 6°C.

Parsnip across Canada, town by town

RadishOutdoors Apr 14 to Sep 24; Under cover Mar 17 to Oct 22

Sow outdoors: Apr 14 to Sep 24
Under cover: Mar 17 to Oct 22
First harvest: About 18 days after sowing. Sown on April 14, ready around May 2.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Radish across Canada, town by town

PotatoOutdoors Apr 14 to Jun 9; Under cover Mar 17 to Jul 7

Plant outdoors: Apr 14 to Jun 9
Under cover: Mar 17 to Jul 7
First harvest: About 65 days after planting. Planted on April 14, ready around June 18.
Warmth: Hardy: grows once days average 6°C.

Potato across Canada, town by town

TurnipOutdoors Apr 14 to Aug 27; Under cover Mar 17 to Sep 24

Sow outdoors: Apr 14 to Aug 27
Under cover: Mar 17 to Sep 24
First harvest: About 38 days after sowing. Sown on April 14, ready around May 22.
Warmth: Hardy: grows once days average 6°C.

Turnip across Canada, town by town

Leaves

LettuceOutdoors Apr 15 to Jun 7, and Jul 21 to Aug 23; Under cover Mar 18 to Sep 20

Sow outdoors: Apr 15 to Jun 7, and Jul 21 to Aug 23
Under cover: Mar 18 to Sep 20
First harvest: About 46 days after sowing. Sown on April 15, ready around May 31.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Lettuce across Canada, town by town

SpinachOutdoors Apr 14 to Jun 7, and Jul 21 to Sep 18; Under cover Mar 17 to Oct 16

Sow outdoors: Apr 14 to Jun 7, and Jul 21 to Sep 18
Under cover: Mar 17 to Oct 16
First harvest: About 29 days after sowing. Sown on April 14, ready around May 13.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Spinach across Canada, town by town

Swiss chardOutdoors Apr 19 to Aug 27; Under cover Mar 22 to Sep 24

Sow outdoors: Apr 19 to Aug 27
Under cover: Mar 22 to Sep 24
First harvest: About 43 days after sowing. Sown on April 19, ready around June 1.
Warmth: Hardy: grows once days average 7°C.

Swiss chard across Canada, town by town

ArugulaOutdoors Apr 14 to Jun 7, and Jul 21 to Sep 20; Under cover Mar 17 to Oct 18

Sow outdoors: Apr 14 to Jun 7, and Jul 21 to Sep 20
Under cover: Mar 17 to Oct 18
First harvest: About 26 days after sowing. Sown on April 14, ready around May 10.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Arugula across Canada, town by town

CeleryOutdoors Apr 11 to Jun 10; Under cover Mar 14 to Jul 8

Sow outdoors: Apr 11 to Jun 10
Under cover: Mar 14 to Jul 8
First harvest: About 80 days after sowing. Sown on April 11, ready around June 30.
Warmth: Hardy: grows once days average 5°C.

Celery across Canada, town by town

Beans and peas

Runner beanOutdoors May 20 to Jul 5, and Jul 27 to Aug 5; Under cover Apr 22 to Aug 5, and Aug 24 to Sep 2

Sow outdoors: May 20 to Jul 5, and Jul 27 to Aug 5
Under cover: Apr 22 to Aug 5, and Aug 24 to Sep 2
First harvest: About 58 days after sowing. Sown on May 20, ready around July 17.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Runner bean across Canada, town by town

Green beanOutdoors May 20 to Aug 15; Under cover Apr 22 to Sep 12

Sow outdoors: May 20 to Aug 15
Under cover: Apr 22 to Sep 12
First harvest: About 49 days after sowing. Sown on May 20, ready around July 8.
Warmth: Tender: needs days averaging 11°C or more, and no frost.

Green bean across Canada, town by town

Fava beanOutdoors Apr 8 to Apr 23; Under cover Mar 11 to Mar 26, and Apr 8 to Apr 23, and May 6 to May 21

Sow outdoors: Apr 8 to Apr 23
Under cover: Mar 11 to Mar 26, and Apr 8 to Apr 23, and May 6 to May 21
First harvest: About 220 days after sowing. Sown on April 8, ready around November 14.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Fava bean across Canada, town by town

PeaOutdoors Apr 14 to Aug 7; Under cover Mar 17 to Sep 4

Sow outdoors: Apr 14 to Aug 7
Under cover: Mar 17 to Sep 4
First harvest: About 51 days after sowing. Sown on April 14, ready around June 4.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Pea across Canada, town by town

Onion family

OnionOutdoors Apr 13 to Jun 3; Under cover Mar 16 to Jul 1

Plant outdoors: Apr 13 to Jun 3
Under cover: Mar 16 to Jul 1
First harvest: About 91 days after planting. Planted on April 13, ready around July 13.
Warmth: Hardy: grows once days average 6°C.

Onion across Canada, town by town

GarlicOutdoors Oct 13 to Nov 10; Under cover Sep 15 to Dec 8

Plant outdoors: Oct 13 to Nov 10
Under cover: Sep 15 to Dec 8
First harvest: About 250 days after planting. Planted on October 13, ready around June 20.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across Canada, town by town

LeekOutdoors Apr 14 to Jul 30; Under cover Mar 17 to Aug 27

Sow outdoors: Apr 14 to Jul 30
Under cover: Mar 17 to Aug 27
First harvest: About 99 days after sowing. Sown on April 14, ready around July 22.
Warmth: Hardy: grows once days average 6°C.

Leek across Canada, town by town

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

Sow outdoors: Apr 11 to Sep 6
Under cover: Mar 14 to Oct 4
First harvest: About 42 days after sowing. Sown on April 11, ready around May 23.
Warmth: Hardy: grows once days average 5°C.

Scallion across Canada, town by town

ShallotOutdoors Apr 8 to Jun 21; Under cover Mar 11 to Jul 19

Plant outdoors: Apr 8 to Jun 21
Under cover: Mar 11 to Jul 19
First harvest: About 78 days after planting. Planted on April 8, ready around June 25.
Warmth: Hardy: grows once days average 5°C.

Shallot across Canada, town by town

Brassicas

CabbageOutdoors Apr 14 to Aug 14; Under cover Mar 17 to Sep 11

Sow outdoors: Apr 14 to Aug 14
Under cover: Mar 17 to Sep 11
First harvest: About 72 days after sowing. Sown on April 14, ready around June 25.
Warmth: Hardy: grows once days average 6°C.

Cabbage across Canada, town by town

BroccoliOutdoors Apr 19 to Aug 1; Under cover Mar 22 to Aug 29

Sow outdoors: Apr 19 to Aug 1
Under cover: Mar 22 to Aug 29
First harvest: About 63 days after sowing. Sown on April 19, ready around June 21.
Warmth: Hardy: grows once days average 7°C.

Broccoli across Canada, town by town

CauliflowerOutdoors Apr 14 to Jul 15; Under cover Mar 17 to Aug 12

Sow outdoors: Apr 14 to Jul 15
Under cover: Mar 17 to Aug 12
First harvest: About 79 days after sowing. Sown on April 14, ready around July 2.
Warmth: Hardy: grows once days average 6°C; bolts in hot weather.

Cauliflower across Canada, town by town

Brussels sproutOutdoors Apr 14 to Jun 14; Under cover Mar 17 to Jul 12

Sow outdoors: Apr 14 to Jun 14
Under cover: Mar 17 to Jul 12
First harvest: About 117 days after sowing. Sown on April 14, ready around August 9.
Warmth: Hardy: grows once days average 6°C.

Brussels sprout across Canada, town by town

KaleOutdoors Apr 19 to Aug 10; Under cover Mar 22 to Sep 7

Sow outdoors: Apr 19 to Aug 10
Under cover: Mar 22 to Sep 7
First harvest: About 56 days after sowing. Sown on April 19, ready around June 14.
Warmth: Hardy: grows once days average 7°C.

Kale across Canada, town by town

Bok choyOutdoors Apr 23 to Jun 7, and Jul 21 to Sep 10; Under cover Mar 26 to Oct 8

Sow outdoors: Apr 23 to Jun 7, and Jul 21 to Sep 10
Under cover: Mar 26 to Oct 8
First harvest: About 35 days after sowing. Sown on April 23, ready around May 28.
Warmth: Hardy: grows once days average 8°C; bolts in hot weather.

Bok choy across Canada, town by town

Herbs

BasilOutdoors Apr 23 to Aug 19; Under cover Mar 26 to Sep 16

Sow outdoors: Apr 23 to Aug 19
Under cover: Mar 26 to Sep 16
First harvest: About 36 days after sowing. Sown on April 23, ready around May 29.
Warmth: Tender: needs days averaging 8°C or more, and no frost.

Basil across Canada, town by town

ParsleyOutdoors Apr 14 to Aug 25; Under cover Mar 17 to Sep 22

Sow outdoors: Apr 14 to Aug 25
Under cover: Mar 17 to Sep 22
First harvest: About 48 days after sowing. Sown on April 14, ready around June 1.
Warmth: Hardy: grows once days average 6°C.

Parsley across Canada, town by town

CilantroOutdoors Apr 19 to Jun 7, and Jul 21 to Sep 8; Under cover Mar 22 to Oct 6

Sow outdoors: Apr 19 to Jun 7, and Jul 21 to Sep 8
Under cover: Mar 22 to Oct 6
First harvest: About 36 days after sowing. Sown on April 19, ready around May 25.
Warmth: Hardy: grows once days average 7°C; bolts in hot weather.

Cilantro across Canada, town by town

ChivesOutdoors Apr 14 to Jun 30, and Jul 27 to Aug 9; Under cover Mar 17 to Aug 9, and Aug 24 to Sep 6

Sow outdoors: Apr 14 to Jun 30, and Jul 27 to Aug 9
Under cover: Mar 17 to Aug 9, and Aug 24 to Sep 6
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 19 to Sep 28; Under cover Mar 22 to Oct 26

Sow outdoors: Apr 19 to Sep 28
Under cover: Mar 22 to Oct 26
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 14 to Jun 14, and Jul 27 to Aug 6; Under cover Mar 17 to Jul 12, and Jul 27 to Aug 6, and Aug 24 to Sep 3

Plant outdoors: Apr 14 to Jun 14, and Jul 27 to Aug 6
Under cover: Mar 17 to Jul 12, and Jul 27 to Aug 6, and Aug 24 to Sep 3
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 29 to Nov 17; Under cover Oct 1 to Oct 20, and Oct 29 to Nov 17, and Nov 26 to Dec 15

Plant outdoors: Oct 29 to Nov 17
Under cover: Oct 1 to Oct 20, and Oct 29 to Nov 17, and Nov 26 to Dec 15
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 20 to Nov 14; Under cover Sep 22 to Dec 12

Plant outdoors: Oct 20 to Nov 14
Under cover: Sep 22 to Dec 12
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 Oshawa

When is the last frost in Oshawa?

On average around April 21, and the first autumn frost comes around November 4. 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 Oshawa?

Yes. Plant them outdoors May 26 to Jun 20, or under cover Apr 28 to Jul 18.

What can I sow in Oshawa in November?

Outdoors: 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 backyard or community garden plot in Oshawa. 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