Pennsylvania, US

Planting calendar for Allentown

Last frost around April 6, first frost around November 9: about 217 frost-free days.

Last frost: April 6
First frost: November 9
Frost-free days: 217

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 Allentown. 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 Allentown, 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 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
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 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
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: 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: 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
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 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: 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 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
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: 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
Shallot	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
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 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 11 to Jun 5, and Jul 27 to Aug 9; Under cover Apr 13 to Jul 12, and Jul 27 to Aug 9, and Aug 24 to Sep 6

Sow outdoors: May 11 to Jun 5, and Jul 27 to Aug 9
Under cover: Apr 13 to Jul 12, and Jul 27 to Aug 9, and Aug 24 to Sep 6
First harvest: About 66 days after sowing. Sown on May 11, ready around July 16.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Tomato across the US, town by town

Chile pepperOutdoors May 10 to Jun 5, and Jul 27 to Aug 8; Under cover Apr 12 to Jul 11, and Jul 27 to Aug 8, and Aug 24 to Sep 5

Sow outdoors: May 10 to Jun 5, and Jul 27 to Aug 8
Under cover: Apr 12 to Jul 11, and Jul 27 to Aug 8, and Aug 24 to Sep 5
First harvest: About 84 days after sowing. Sown on May 10, ready around August 2.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Chile pepper across the US, town by town

Bell pepperOutdoors May 15 to Jun 10, and Jul 27 to Aug 10; Under cover Apr 17 to Jul 13, and Jul 27 to Aug 10, and Aug 24 to Sep 7

Sow outdoors: May 15 to Jun 10, and Jul 27 to Aug 10
Under cover: Apr 17 to Jul 13, and Jul 27 to Aug 10, and Aug 24 to Sep 7
First harvest: About 78 days after sowing. Sown on May 15, ready around August 1.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Bell pepper across the US, town by town

EggplantOutdoors May 15 to Jun 5, and Jul 27 to Aug 8; Under cover Apr 17 to Jul 11, and Jul 27 to Aug 8, and Aug 24 to Sep 5

Sow outdoors: May 15 to Jun 5, and Jul 27 to Aug 8
Under cover: Apr 17 to Jul 11, and Jul 27 to Aug 8, and Aug 24 to Sep 5
First harvest: About 90 days after sowing. Sown on May 15, ready around August 13.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Eggplant across the US, town by town

ZucchiniOutdoors May 10 to Jun 20, and Jul 27 to Aug 28; Under cover Apr 12 to Sep 25

Sow outdoors: May 10 to Jun 20, and Jul 27 to Aug 28
Under cover: Apr 12 to Sep 25
First harvest: About 43 days after sowing. Sown on May 10, ready around June 22.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Zucchini across the US, town by town

CucumberOutdoors May 10 to Jun 20, and Jul 27 to Aug 23; Under cover Apr 12 to Sep 20

Sow outdoors: May 10 to Jun 20, and Jul 27 to Aug 23
Under cover: Apr 12 to Sep 20
First harvest: About 48 days after sowing. Sown on May 10, ready around June 27.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Cucumber across the US, town by town

Winter squashOutdoors May 10 to Jun 10, and Jul 27 to Aug 10; Under cover Apr 12 to Jul 13, and Jul 27 to Aug 10, and Aug 24 to Sep 7

Sow outdoors: May 10 to Jun 10, and Jul 27 to Aug 10
Under cover: Apr 12 to Jul 13, and Jul 27 to Aug 10, and Aug 24 to Sep 7
First harvest: About 66 days after sowing. Sown on May 10, ready around July 15.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Winter squash across the US, town by town

Sweet cornOutdoors May 5 to Jun 10, and Jul 27 to Aug 12; Under cover Apr 7 to Jul 15, and Jul 27 to Aug 12, and Aug 24 to Sep 9

Sow outdoors: May 5 to Jun 10, and Jul 27 to Aug 12
Under cover: Apr 7 to Jul 15, and Jul 27 to Aug 12, and Aug 24 to Sep 9
First harvest: About 62 days after sowing. Sown on May 5, ready around July 6.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Sweet corn across the US, town by town

Roots

CarrotOutdoors Apr 1 to Jul 10, and Jul 27 to Aug 11; Under cover Mar 4 to Aug 11, and Aug 24 to Sep 8

Sow outdoors: Apr 1 to Jul 10, and Jul 27 to Aug 11
Under cover: Mar 4 to Aug 11, and Aug 24 to Sep 8
First harvest: About 74 days after sowing. Sown on April 1, ready around June 14.
Warmth: Hardy: grows once days average 45°F.

Carrot across the US, town by town

BeetOutdoors Apr 1 to Aug 25; Under cover Mar 4 to Sep 22

Sow outdoors: Apr 1 to Aug 25
Under cover: Mar 4 to Sep 22
First harvest: About 52 days after sowing. Sown on April 1, ready around May 23.
Warmth: Hardy: grows once days average 45°F.

Beet across the US, town by town

ParsnipOutdoors Mar 26 to Jun 11; Under cover Feb 26 to Jul 9

Sow outdoors: Mar 26 to Jun 11
Under cover: Feb 26 to Jul 9
First harvest: About 90 days after sowing. Sown on March 26, ready around June 24.
Warmth: Hardy: grows once days average 43°F.

Parsnip across the US, town by town

RadishOutdoors Mar 26 to May 28, and Jul 30 to Oct 3; Under cover Feb 26 to Oct 31

Sow outdoors: Mar 26 to May 28, and Jul 30 to Oct 3
Under cover: Feb 26 to Oct 31
First harvest: About 20 days after sowing. Sown on March 26, ready around April 15.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Radish across the US, town by town

PotatoOutdoors Mar 26 to May 21, and Jul 27 to Aug 11; Under cover Feb 26 to Jun 18, and Jun 29 to Jul 14, and Jul 27 to Aug 11, and Aug 24 to Sep 8

Plant outdoors: Mar 26 to May 21, and Jul 27 to Aug 11
Under cover: Feb 26 to Jun 18, and Jun 29 to Jul 14, and Jul 27 to Aug 11, and Aug 24 to Sep 8
First harvest: About 69 days after planting. Planted on March 26, ready around June 3.
Warmth: Hardy: grows once days average 43°F.

Potato across the US, town by town

TurnipOutdoors Mar 26 to Jun 9, and Jul 18 to Sep 6; Under cover Feb 26 to Oct 4

Sow outdoors: Mar 26 to Jun 9, and Jul 18 to Sep 6
Under cover: Feb 26 to Oct 4
First harvest: About 41 days after sowing. Sown on March 26, ready around May 6.
Warmth: Hardy: grows once days average 43°F.

Turnip across the US, town by town

Leaves

LettuceOutdoors Mar 28 to May 19, and Aug 7 to Sep 1; Under cover Feb 28 to Jun 16, and Jul 10 to Sep 29

Sow outdoors: Mar 28 to May 19, and Aug 7 to Sep 1
Under cover: Feb 28 to Jun 16, and Jul 10 to Sep 29
First harvest: About 50 days after sowing. Sown on March 28, ready around May 17.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Lettuce across the US, town by town

SpinachOutdoors Mar 26 to May 19, and Aug 7 to Sep 28; Under cover Feb 26 to Jun 16, and Jul 10 to Oct 26

Sow outdoors: Mar 26 to May 19, and Aug 7 to Sep 28
Under cover: Feb 26 to Jun 16, and Jul 10 to Oct 26
First harvest: About 31 days after sowing. Sown on March 26, ready around April 26.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Spinach across the US, town by town

Swiss chardOutdoors Apr 1 to Sep 6; Under cover Mar 4 to Oct 4

Sow outdoors: Apr 1 to Sep 6
Under cover: Mar 4 to Oct 4
First harvest: About 45 days after sowing. Sown on April 1, ready around May 16.
Warmth: Hardy: grows once days average 45°F.

Swiss chard across the US, town by town

ArugulaOutdoors Mar 26 to May 19, and Aug 7 to Sep 29; Under cover Feb 26 to Jun 16, and Jul 10 to Oct 27

Sow outdoors: Mar 26 to May 19, and Aug 7 to Sep 29
Under cover: Feb 26 to Jun 16, and Jul 10 to Oct 27
First harvest: About 28 days after sowing. Sown on March 26, ready around April 23.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Arugula across the US, town by town

CeleryOutdoors Mar 22 to May 21; Under cover Feb 22 to Jun 18

Sow outdoors: Mar 22 to May 21
Under cover: Feb 22 to Jun 18
First harvest: About 85 days after sowing. Sown on March 22, ready around June 15.
Warmth: Hardy: grows once days average 41°F.

Celery across the US, town by town

Beans and peas

Runner beanOutdoors May 5 to Jun 20, and Jul 27 to Aug 17; Under cover Apr 7 to Sep 14

Sow outdoors: May 5 to Jun 20, and Jul 27 to Aug 17
Under cover: Apr 7 to Sep 14
First harvest: About 58 days after sowing. Sown on May 5, 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 5 to Jul 5, and Jul 27 to Aug 26; Under cover Apr 7 to Sep 23

Sow outdoors: May 5 to Jul 5, and Jul 27 to Aug 26
Under cover: Apr 7 to Sep 23
First harvest: About 50 days after sowing. Sown on May 5, ready around June 24.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Green bean across the US, town by town

Fava beanOutdoors Oct 21 to Nov 16; Under cover Sep 23 to Dec 14

Sow outdoors: Oct 21 to Nov 16
Under cover: Sep 23 to Dec 14
First harvest: About 220 days after sowing. Sown on October 21, ready around May 29.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Fava bean across the US, town by town

PeaOutdoors Mar 26 to May 28, and Jul 30 to Aug 17; Under cover Feb 26 to Jul 20, and Jul 30 to Aug 17, and Aug 27 to Sep 14

Sow outdoors: Mar 26 to May 28, and Jul 30 to Aug 17
Under cover: Feb 26 to Jul 20, and Jul 30 to Aug 17, and Aug 27 to Sep 14
First harvest: About 55 days after sowing. Sown on March 26, ready around May 20.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Pea across the US, town by town

Onion family

OnionOutdoors Mar 24 to May 14; Under cover Feb 24 to Jun 11

Plant outdoors: Mar 24 to May 14
Under cover: Feb 24 to Jun 11
First harvest: About 94 days after planting. Planted on March 24, ready around June 26.
Warmth: Hardy: grows once days average 43°F.

Onion across the US, town by town

GarlicOutdoors Oct 21 to Nov 21; Under cover Sep 23 to Dec 19

Plant outdoors: Oct 21 to Nov 21
Under cover: Sep 23 to Dec 19
First harvest: About 250 days after planting. Planted on October 21, ready around June 28.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across the US, town by town

LeekOutdoors Mar 26 to Jul 11; Under cover Feb 26 to Aug 8

Sow outdoors: Mar 26 to Jul 11
Under cover: Feb 26 to Aug 8
First harvest: About 103 days after sowing. Sown on March 26, ready around July 7.
Warmth: Hardy: grows once days average 43°F.

Leek across the US, town by town

ScallionOutdoors Mar 22 to Sep 16; Under cover Feb 22 to Oct 14

Sow outdoors: Mar 22 to Sep 16
Under cover: Feb 22 to Oct 14
First harvest: About 44 days after sowing. Sown on March 22, ready around May 5.
Warmth: Hardy: grows once days average 41°F.

Scallion across the US, town by town

ShallotOutdoors Mar 18 to May 31; Under cover Feb 18 to Jun 28

Plant outdoors: Mar 18 to May 31
Under cover: Feb 18 to Jun 28
First harvest: About 78 days after planting. Planted on March 18, ready around June 4.
Warmth: Hardy: grows once days average 41°F.

Shallot across the US, town by town

Brassicas

CabbageOutdoors Mar 26 to Aug 10; Under cover Feb 26 to Sep 7

Sow outdoors: Mar 26 to Aug 10
Under cover: Feb 26 to Sep 7
First harvest: About 76 days after sowing. Sown on March 26, ready around June 10.
Warmth: Hardy: grows once days average 43°F.

Cabbage across the US, town by town

BroccoliOutdoors Apr 1 to Jun 30, and Jul 27 to Aug 12; Under cover Mar 4 to Aug 12, and Aug 24 to Sep 9

Sow outdoors: Apr 1 to Jun 30, and Jul 27 to Aug 12
Under cover: Mar 4 to Aug 12, and Aug 24 to Sep 9
First harvest: About 67 days after sowing. Sown on April 1, ready around June 7.
Warmth: Hardy: grows once days average 45°F.

Broccoli across the US, town by town

CauliflowerOutdoors Mar 26 to May 28; Under cover Feb 26 to Jun 25

Sow outdoors: Mar 26 to May 28
Under cover: Feb 26 to Jun 25
First harvest: About 83 days after sowing. Sown on March 26, ready around June 17.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Cauliflower across the US, town by town

Brussels sproutOutdoors Mar 26 to May 26; Under cover Feb 26 to Jun 23

Sow outdoors: Mar 26 to May 26
Under cover: Feb 26 to Jun 23
First harvest: About 120 days after sowing. Sown on March 26, ready around July 24.
Warmth: Hardy: grows once days average 43°F.

Brussels sprout across the US, town by town

KaleOutdoors Apr 1 to Aug 20; Under cover Mar 4 to Sep 17

Sow outdoors: Apr 1 to Aug 20
Under cover: Mar 4 to Sep 17
First harvest: About 60 days after sowing. Sown on April 1, ready around May 31.
Warmth: Hardy: grows once days average 45°F.

Kale across the US, town by town

Bok choyOutdoors Apr 7 to May 19, and Aug 7 to Sep 19; Under cover Mar 10 to Jun 16, and Jul 10 to Oct 17

Sow outdoors: Apr 7 to May 19, and Aug 7 to Sep 19
Under cover: Mar 10 to Jun 16, and Jul 10 to Oct 17
First harvest: About 37 days after sowing. Sown on April 7, ready around May 14.
Warmth: Hardy: grows once days average 46°F; bolts in hot weather.

Bok choy across the US, town by town

Herbs

BasilOutdoors Apr 7 to Jul 7, and Jul 27 to Aug 29; Under cover Mar 10 to Sep 26

Sow outdoors: Apr 7 to Jul 7, and Jul 27 to Aug 29
Under cover: Mar 10 to Sep 26
First harvest: About 39 days after sowing. Sown on April 7, ready around May 16.
Warmth: Tender: needs days averaging 46°F or more, and no frost.

Basil across the US, town by town

ParsleyOutdoors Mar 26 to Sep 4; Under cover Feb 26 to Oct 2

Sow outdoors: Mar 26 to Sep 4
Under cover: Feb 26 to Oct 2
First harvest: About 51 days after sowing. Sown on March 26, ready around May 16.
Warmth: Hardy: grows once days average 43°F.

Parsley across the US, town by town

CilantroOutdoors Apr 1 to May 19, and Aug 7 to Sep 18; Under cover Mar 4 to Jun 16, and Jul 10 to Oct 16

Sow outdoors: Apr 1 to May 19, and Aug 7 to Sep 18
Under cover: Mar 4 to Jun 16, and Jul 10 to Oct 16
First harvest: About 38 days after sowing. Sown on April 1, ready around May 9.
Warmth: Hardy: grows once days average 45°F; bolts in hot weather.

Cilantro across the US, town by town

ChivesOutdoors Mar 26 to Jun 11, and Jul 27 to Aug 20; Under cover Feb 26 to Sep 17

Sow outdoors: Mar 26 to Jun 11, and Jul 27 to Aug 20
Under cover: Feb 26 to Sep 17
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 1 to Oct 7; Under cover Mar 4 to Nov 4

Sow outdoors: Apr 1 to Oct 7
Under cover: Mar 4 to Nov 4
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 26 to May 26, and Jul 27 to Aug 17; Under cover Feb 26 to Sep 14

Plant outdoors: Mar 26 to May 26, and Jul 27 to Aug 17
Under cover: Feb 26 to Sep 14
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 7 to Nov 29; Under cover Oct 10 to Dec 27

Plant outdoors: Nov 7 to Nov 29
Under cover: Oct 10 to Dec 27
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 Allentown

When is the last frost in Allentown?

On average around April 6, and the first autumn frost comes around November 9. 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 Allentown?

Yes. Plant them outdoors May 11 to Jun 5, and Jul 27 to Aug 9, or under cover Apr 13 to Jul 12, and Jul 27 to Aug 9, and Aug 24 to Sep 6.

What can I sow in Allentown 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 Allentown. 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