Connecticut, US

Planting calendar for New Haven

Last frost around April 2, first frost around November 12: about 224 frost-free days.

Last frost: April 2
First frost: November 12
Frost-free days: 224

Sow now: November

See the whole year

Outdoors

Fava bean
Garlic
Raspberry
Rhubarb

Under cover

Nothing this month.

The year at a glance

When each crop can be sown in New Haven. 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 New Haven, month by month. Each month says whether you can sow outdoors, under cover, or both.
Crop	JJan	FFeb	MMar	AApr	MMay	JJun	JJul	AAug	SSep	OOct	NNov	DDec
Fruiting
Tomato	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow 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
Chile pepper	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow 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
Bell pepper	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow 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
Eggplant	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow 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
Zucchini	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: 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: Sow 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: 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: Sow under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Sow under cover	August: Sow outdoors and under cover	September: Sow under cover	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 under cover	July: Sow under cover	August: Sow outdoors and under cover	September: Sow under cover	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 outdoors and under cover	September: Sow under cover	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 under cover	July: Sow 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 under cover	July: Plant under cover	August: Plant outdoors and under cover	September: Plant under cover	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 under cover	July: Sow 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 under cover	July: Sow 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 under cover	July: Sow 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 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
Beans and peas
Runner bean	January: Not this month	February: Not this month	March: Not this month	April: Sow under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: Sow outdoors and under cover	September: Sow under cover	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 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: 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: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Sow under cover	August: Sow outdoors and under cover	September: Sow under cover	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 outdoors and under cover	October: Sow under cover	November: Not this month	December: Not this month
Shallot	January: Not this month	February: Not this month	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
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 outdoors and under cover	September: Sow under cover	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 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
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 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 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: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Sow 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: 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
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 under cover	July: Sow 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
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: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Mint	January: Not this month	February: Not this month	March: Sow under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow outdoors and under cover	October: Sow outdoors and under cover	November: Not this month	December: Not this month
Fruit
Strawberry	January: Not this month	February: Not this month	March: Plant under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant under cover	July: Plant under cover	August: Plant outdoors and under cover	September: Plant under cover	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: Not this month	October: Plant 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 7 to Jun 1, and Jul 29 to Aug 9; Under cover Apr 9 to Jul 12, and Jul 29 to Aug 9, and Aug 26 to Sep 6

Sow outdoors: May 7 to Jun 1, and Jul 29 to Aug 9
Under cover: Apr 9 to Jul 12, and Jul 29 to Aug 9, and Aug 26 to Sep 6
First harvest: About 67 days after sowing. Sown on May 7, ready around July 13.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Tomato across the US, town by town

Chile pepperOutdoors May 6 to Jun 1, and Jul 29 to Aug 7; Under cover Apr 8 to Jul 10, and Jul 29 to Aug 7, and Aug 26 to Sep 4

Sow outdoors: May 6 to Jun 1, and Jul 29 to Aug 7
Under cover: Apr 8 to Jul 10, and Jul 29 to Aug 7, and Aug 26 to Sep 4
First harvest: About 84 days after sowing. Sown on May 6, ready around July 29.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Chile pepper across the US, town by town

Bell pepperOutdoors May 11 to Jun 6, and Jul 29 to Aug 9; Under cover Apr 13 to Jul 12, and Jul 29 to Aug 9, and Aug 26 to Sep 6

Sow outdoors: May 11 to Jun 6, and Jul 29 to Aug 9
Under cover: Apr 13 to Jul 12, and Jul 29 to Aug 9, and Aug 26 to Sep 6
First harvest: About 78 days after sowing. Sown on May 11, ready around July 28.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Bell pepper across the US, town by town

EggplantOutdoors May 11 to Jun 1, and Jul 29 to Aug 7; Under cover Apr 13 to Jul 10, and Jul 29 to Aug 7, and Aug 26 to Sep 4

Sow outdoors: May 11 to Jun 1, and Jul 29 to Aug 7
Under cover: Apr 13 to Jul 10, and Jul 29 to Aug 7, and Aug 26 to Sep 4
First harvest: About 90 days after sowing. Sown on May 11, ready around August 9.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Eggplant across the US, town by town

ZucchiniOutdoors May 6 to Jun 16, and Jul 29 to Aug 28; Under cover Apr 8 to Sep 25

Sow outdoors: May 6 to Jun 16, and Jul 29 to Aug 28
Under cover: Apr 8 to Sep 25
First harvest: About 45 days after sowing. Sown on May 6, ready around June 20.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Zucchini across the US, town by town

CucumberOutdoors May 6 to Jun 16, and Jul 29 to Aug 23; Under cover Apr 8 to Sep 20

Sow outdoors: May 6 to Jun 16, and Jul 29 to Aug 23
Under cover: Apr 8 to Sep 20
First harvest: About 51 days after sowing. Sown on May 6, ready around June 26.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Cucumber across the US, town by town

Winter squashOutdoors May 6 to Jun 6, and Jul 29 to Aug 10; Under cover Apr 8 to Jul 13, and Jul 29 to Aug 10, and Aug 26 to Sep 7

Sow outdoors: May 6 to Jun 6, and Jul 29 to Aug 10
Under cover: Apr 8 to Jul 13, and Jul 29 to Aug 10, and Aug 26 to Sep 7
First harvest: About 68 days after sowing. Sown on May 6, ready around July 13.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Winter squash across the US, town by town

Sweet cornOutdoors May 1 to Jun 6, and Jul 29 to Aug 12; Under cover Apr 3 to Jul 15, and Jul 29 to Aug 12, and Aug 26 to Sep 9

Sow outdoors: May 1 to Jun 6, and Jul 29 to Aug 12
Under cover: Apr 3 to Jul 15, and Jul 29 to Aug 12, and Aug 26 to Sep 9
First harvest: About 67 days after sowing. Sown on May 1, ready around July 7.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Sweet corn across the US, town by town

Roots

CarrotOutdoors Apr 6 to Aug 11; Under cover Mar 9 to Sep 8

Sow outdoors: Apr 6 to Aug 11
Under cover: Mar 9 to Sep 8
First harvest: About 74 days after sowing. Sown on April 6, ready around June 19.
Warmth: Hardy: grows once days average 45°F.

Carrot across the US, town by town

BeetOutdoors Apr 6 to Aug 25; Under cover Mar 9 to Sep 22

Sow outdoors: Apr 6 to Aug 25
Under cover: Mar 9 to Sep 22
First harvest: About 53 days after sowing. Sown on April 6, ready around May 29.
Warmth: Hardy: grows once days average 45°F.

Beet across the US, town by town

ParsnipOutdoors Mar 31 to Jun 16; Under cover Mar 3 to Jul 14

Sow outdoors: Mar 31 to Jun 16
Under cover: Mar 3 to Jul 14
First harvest: About 91 days after sowing. Sown on March 31, ready around June 30.
Warmth: Hardy: grows once days average 43°F.

Parsnip across the US, town by town

RadishOutdoors Mar 31 to Jun 5, and Jul 27 to Oct 3; Under cover Mar 3 to Oct 31

Sow outdoors: Mar 31 to Jun 5, and Jul 27 to Oct 3
Under cover: Mar 3 to Oct 31
First harvest: About 20 days after sowing. Sown on March 31, ready around April 20.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Radish across the US, town by town

PotatoOutdoors Mar 31 to May 26, and Jul 29 to Aug 11; Under cover Mar 3 to Jul 14, and Jul 29 to Aug 11, and Aug 26 to Sep 8

Plant outdoors: Mar 31 to May 26, and Jul 29 to Aug 11
Under cover: Mar 3 to Jul 14, and Jul 29 to Aug 11, and Aug 26 to Sep 8
First harvest: About 70 days after planting. Planted on March 31, ready around June 9.
Warmth: Hardy: grows once days average 43°F.

Potato across the US, town by town

TurnipOutdoors Mar 31 to Jun 22, and Jul 10 to Sep 6; Under cover Mar 3 to Oct 4

Sow outdoors: Mar 31 to Jun 22, and Jul 10 to Sep 6
Under cover: Mar 3 to Oct 4
First harvest: About 42 days after sowing. Sown on March 31, ready around May 12.
Warmth: Hardy: grows once days average 43°F.

Turnip across the US, town by town

Leaves

LettuceOutdoors Apr 1 to May 26, and Aug 5 to Sep 1; Under cover Mar 4 to Jun 23, and Jul 8 to Sep 29

Sow outdoors: Apr 1 to May 26, and Aug 5 to Sep 1
Under cover: Mar 4 to Jun 23, and Jul 8 to Sep 29
First harvest: About 49 days after sowing. Sown on April 1, ready around May 20.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Lettuce across the US, town by town

SpinachOutdoors Mar 31 to May 26, and Aug 5 to Sep 28; Under cover Mar 3 to Jun 23, and Jul 8 to Oct 26

Sow outdoors: Mar 31 to May 26, and Aug 5 to Sep 28
Under cover: Mar 3 to Jun 23, and Jul 8 to Oct 26
First harvest: About 31 days after sowing. Sown on March 31, ready around May 1.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Spinach across the US, town by town

Swiss chardOutdoors Apr 6 to Sep 6; Under cover Mar 9 to Oct 4

Sow outdoors: Apr 6 to Sep 6
Under cover: Mar 9 to Oct 4
First harvest: About 45 days after sowing. Sown on April 6, ready around May 21.
Warmth: Hardy: grows once days average 45°F.

Swiss chard across the US, town by town

ArugulaOutdoors Mar 31 to May 26, and Aug 5 to Sep 29; Under cover Mar 3 to Jun 23, and Jul 8 to Oct 27

Sow outdoors: Mar 31 to May 26, and Aug 5 to Sep 29
Under cover: Mar 3 to Jun 23, and Jul 8 to Oct 27
First harvest: About 28 days after sowing. Sown on March 31, ready around April 28.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Arugula across the US, town by town

CeleryOutdoors Mar 26 to May 25; Under cover Feb 26 to Jun 22

Sow outdoors: Mar 26 to May 25
Under cover: Feb 26 to Jun 22
First harvest: About 85 days after sowing. Sown on March 26, ready around June 19.
Warmth: Hardy: grows once days average 41°F.

Celery across the US, town by town

Beans and peas

Runner beanOutdoors May 1 to Jun 16, and Jul 29 to Aug 16; Under cover Apr 3 to Jul 19, and Jul 29 to Aug 16, and Aug 26 to Sep 13

Sow outdoors: May 1 to Jun 16, and Jul 29 to Aug 16
Under cover: Apr 3 to Jul 19, and Jul 29 to Aug 16, and Aug 26 to Sep 13
First harvest: About 62 days after sowing. Sown on May 1, ready around July 2.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Runner bean across the US, town by town

Green beanOutdoors May 1 to Jul 1, and Jul 29 to Aug 25; Under cover Apr 3 to Sep 22

Sow outdoors: May 1 to Jul 1, and Jul 29 to Aug 25
Under cover: Apr 3 to Sep 22
First harvest: About 51 days after sowing. Sown on May 1, ready around June 21.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Green bean across the US, town by town

Fava beanOutdoors Oct 22 to Nov 17; Under cover Sep 24 to Dec 15

Sow outdoors: Oct 22 to Nov 17
Under cover: Sep 24 to Dec 15
First harvest: About 220 days after sowing. Sown on October 22, ready around May 30.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Fava bean across the US, town by town

PeaOutdoors Mar 31 to Jun 5, and Jul 29 to Aug 17; Under cover Mar 3 to Jul 20, and Jul 29 to Aug 17, and Aug 26 to Sep 14

Sow outdoors: Mar 31 to Jun 5, and Jul 29 to Aug 17
Under cover: Mar 3 to Jul 20, and Jul 29 to Aug 17, and Aug 26 to Sep 14
First harvest: About 56 days after sowing. Sown on March 31, ready around May 26.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Pea across the US, town by town

Onion family

OnionOutdoors Mar 29 to May 19; Under cover Mar 1 to Jun 16

Plant outdoors: Mar 29 to May 19
Under cover: Mar 1 to Jun 16
First harvest: About 96 days after planting. Planted on March 29, ready around July 3.
Warmth: Hardy: grows once days average 43°F.

Onion across the US, town by town

GarlicOutdoors Oct 22 to Nov 21; Under cover Sep 24 to Dec 19

Plant outdoors: Oct 22 to Nov 21
Under cover: Sep 24 to Dec 19
First harvest: About 250 days after planting. Planted on October 22, ready around June 29.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across the US, town by town

LeekOutdoors Mar 31 to Jul 16; Under cover Mar 3 to Aug 13

Sow outdoors: Mar 31 to Jul 16
Under cover: Mar 3 to Aug 13
First harvest: About 104 days after sowing. Sown on March 31, ready around July 13.
Warmth: Hardy: grows once days average 43°F.

Leek across the US, town by town

ScallionOutdoors Mar 26 to Sep 16; Under cover Feb 26 to Oct 14

Sow outdoors: Mar 26 to Sep 16
Under cover: Feb 26 to Oct 14
First harvest: About 43 days after sowing. Sown on March 26, ready around May 8.
Warmth: Hardy: grows once days average 41°F.

Scallion across the US, town by town

ShallotOutdoors Mar 23 to Jun 5; Under cover Feb 23 to Jul 3

Plant outdoors: Mar 23 to Jun 5
Under cover: Feb 23 to Jul 3
First harvest: About 79 days after planting. Planted on March 23, ready around June 10.
Warmth: Hardy: grows once days average 41°F.

Shallot across the US, town by town

Brassicas

CabbageOutdoors Mar 31 to Aug 10; Under cover Mar 3 to Sep 7

Sow outdoors: Mar 31 to Aug 10
Under cover: Mar 3 to Sep 7
First harvest: About 77 days after sowing. Sown on March 31, ready around June 16.
Warmth: Hardy: grows once days average 43°F.

Cabbage across the US, town by town

BroccoliOutdoors Apr 6 to Jul 5, and Jul 29 to Aug 12; Under cover Mar 9 to Aug 12, and Aug 26 to Sep 9

Sow outdoors: Apr 6 to Jul 5, and Jul 29 to Aug 12
Under cover: Mar 9 to Aug 12, and Aug 26 to Sep 9
First harvest: About 67 days after sowing. Sown on April 6, ready around June 12.
Warmth: Hardy: grows once days average 45°F.

Broccoli across the US, town by town

CauliflowerOutdoors Mar 31 to Jun 5; Under cover Mar 3 to Jul 3

Sow outdoors: Mar 31 to Jun 5
Under cover: Mar 3 to Jul 3
First harvest: About 84 days after sowing. Sown on March 31, ready around June 23.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Cauliflower across the US, town by town

Brussels sproutOutdoors Mar 31 to May 31; Under cover Mar 3 to Jun 28

Sow outdoors: Mar 31 to May 31
Under cover: Mar 3 to Jun 28
First harvest: About 121 days after sowing. Sown on March 31, ready around July 30.
Warmth: Hardy: grows once days average 43°F.

Brussels sprout across the US, town by town

KaleOutdoors Apr 6 to Aug 20; Under cover Mar 9 to Sep 17

Sow outdoors: Apr 6 to Aug 20
Under cover: Mar 9 to Sep 17
First harvest: About 60 days after sowing. Sown on April 6, ready around June 5.
Warmth: Hardy: grows once days average 45°F.

Kale across the US, town by town

Bok choyOutdoors Apr 12 to May 26, and Aug 5 to Sep 19; Under cover Mar 15 to Jun 23, and Jul 8 to Oct 17

Sow outdoors: Apr 12 to May 26, and Aug 5 to Sep 19
Under cover: Mar 15 to Jun 23, and Jul 8 to Oct 17
First harvest: About 37 days after sowing. Sown on April 12, ready around May 19.
Warmth: Hardy: grows once days average 46°F; bolts in hot weather.

Bok choy across the US, town by town

Herbs

BasilOutdoors Apr 12 to Jul 12, and Jul 29 to Aug 29; Under cover Mar 15 to Sep 26

Sow outdoors: Apr 12 to Jul 12, and Jul 29 to Aug 29
Under cover: Mar 15 to Sep 26
First harvest: About 39 days after sowing. Sown on April 12, ready around May 21.
Warmth: Tender: needs days averaging 46°F or more, and no frost.

Basil across the US, town by town

ParsleyOutdoors Mar 31 to Sep 4; Under cover Mar 3 to Oct 2

Sow outdoors: Mar 31 to Sep 4
Under cover: Mar 3 to Oct 2
First harvest: About 52 days after sowing. Sown on March 31, ready around May 22.
Warmth: Hardy: grows once days average 43°F.

Parsley across the US, town by town

CilantroOutdoors Apr 6 to May 26, and Aug 5 to Sep 18; Under cover Mar 9 to Jun 23, and Jul 8 to Oct 16

Sow outdoors: Apr 6 to May 26, and Aug 5 to Sep 18
Under cover: Mar 9 to Jun 23, and Jul 8 to Oct 16
First harvest: About 38 days after sowing. Sown on April 6, ready around May 14.
Warmth: Hardy: grows once days average 45°F; bolts in hot weather.

Cilantro across the US, town by town

ChivesOutdoors Mar 31 to Jun 16, and Jul 29 to Aug 19; Under cover Mar 3 to Sep 16

Sow outdoors: Mar 31 to Jun 16, and Jul 29 to Aug 19
Under cover: Mar 3 to Sep 16
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 43°F.

Chives across the US, town by town

MintOutdoors Apr 6 to Oct 8; Under cover Mar 9 to Nov 5

Sow outdoors: Apr 6 to Oct 8
Under cover: Mar 9 to Nov 5
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 45°F.

Mint across the US, town by town

Fruit

StrawberryOutdoors Mar 31 to May 31, and Jul 29 to Aug 16; Under cover Mar 3 to Jul 19, and Jul 29 to Aug 16, and Aug 26 to Sep 13

Plant outdoors: Mar 31 to May 31, and Jul 29 to Aug 16
Under cover: Mar 3 to Jul 19, and Jul 29 to Aug 16, and Aug 26 to Sep 13
First harvest: Crops every year once it’s established.
Warmth: Hardy: grows once days average 43°F.

Strawberry across the US, town by town

RaspberryOutdoors Nov 8 to Nov 30; Under cover Oct 11 to Dec 28

Plant outdoors: Nov 8 to Nov 30
Under cover: Oct 11 to Dec 28
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 US, town by town

RhubarbOutdoors Oct 29 to Nov 26; Under cover Oct 1 to Dec 24

Plant outdoors: Oct 29 to Nov 26
Under cover: Oct 1 to Dec 24
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 US, town by town

Nearby

Questions about growing in New Haven

When is the last frost in New Haven?

On average around April 2, and the first autumn frost comes around November 12. 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 New Haven?

Yes. Plant them outdoors May 7 to Jun 1, and Jul 29 to Aug 9, or under cover Apr 9 to Jul 12, and Jul 29 to Aug 9, and Aug 26 to Sep 6.

What can I sow in New Haven in November?

Outdoors: fava bean, garlic, raspberry, rhubarb.

How accurate are these dates?

They’re worked out from 30 years of climate data for this spot, adjusted for its height, so they’re a good guide for a typical year. Check the forecast before planting out anything tender.

Get these dates as reminders

Bia turns this calendar into a nudge when it’s time to sow, plant out and harvest, for your backyard or community garden plot in New Haven. 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