Kansas, US

Planting calendar for Olathe

Last frost around April 4, first frost around November 5: about 215 frost-free days.

Last frost: April 4
First frost: November 5
Frost-free days: 215

Sow now: November

See the whole year

Outdoors

Fava bean
Garlic
Raspberry
Rhubarb

Under cover

Mint

The year at a glance

When each crop can be sown in Olathe. 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 Olathe, 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: Sow under cover	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: Sow under cover	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: Sow under cover	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: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow under cover	August: 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: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Parsnip	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow 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
Radish	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Not this month	July: Sow 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
Potato	January: Not this month	February: Plant under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant under cover	July: 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: 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: 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
Leaves
Lettuce	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow under cover	June: Not this month	July: Sow 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
Spinach	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow under cover	June: Not this month	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: 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
Arugula	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow under cover	June: Not this month	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: Sow under cover	August: Sow under cover	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: Not this month	October: Sow outdoors and under cover	November: Sow outdoors and under cover	December: Sow under cover
Pea	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Not this month	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: Plant under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant under cover	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Garlic	January: 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
Leek	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow 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: Plant under cover	August: Plant under cover	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Brassicas
Cabbage	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow 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
Broccoli	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: 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: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Not this month	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Brussels sprout	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow under cover	July: Not this month	August: Not this month	September: Not this month	October: Not this month	November: Not this month	December: Not this month
Kale	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow outdoors and under cover	June: Sow outdoors and under cover	July: Sow outdoors and under cover	August: Sow outdoors and under cover	September: Sow under cover	October: Not this month	November: Not this month	December: Not this month
Bok choy	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: 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: 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
Cilantro	January: Not this month	February: Sow under cover	March: Sow outdoors and under cover	April: Sow outdoors and under cover	May: Sow under cover	June: Not this month	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: 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: 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: 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 outdoors and under cover	November: Sow under cover	December: Not this month
Fruit
Strawberry	January: Not this month	February: Plant under cover	March: Plant outdoors and under cover	April: Plant outdoors and under cover	May: Plant outdoors and under cover	June: Plant under cover	July: 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 9 to Jun 3, and Jul 27 to Aug 19; Under cover Apr 11 to Sep 16

Sow outdoors: May 9 to Jun 3, and Jul 27 to Aug 19
Under cover: Apr 11 to Sep 16
First harvest: About 66 days after sowing. Sown on May 9, ready around July 14.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Tomato across the US, town by town

Chile pepperOutdoors May 8 to Jun 3, and Jul 27 to Aug 17; Under cover Apr 10 to Sep 14

Sow outdoors: May 8 to Jun 3, and Jul 27 to Aug 17
Under cover: Apr 10 to Sep 14
First harvest: About 84 days after sowing. Sown on May 8, ready around July 31.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Chile pepper across the US, town by town

Bell pepperOutdoors May 13 to Jun 8, and Jul 27 to Aug 19; Under cover Apr 15 to Sep 16

Sow outdoors: May 13 to Jun 8, and Jul 27 to Aug 19
Under cover: Apr 15 to Sep 16
First harvest: About 78 days after sowing. Sown on May 13, ready around July 30.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Bell pepper across the US, town by town

EggplantOutdoors May 13 to Jun 3, and Jul 27 to Aug 17; Under cover Apr 15 to Sep 14

Sow outdoors: May 13 to Jun 3, and Jul 27 to Aug 17
Under cover: Apr 15 to Sep 14
First harvest: About 90 days after sowing. Sown on May 13, ready around August 11.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Eggplant across the US, town by town

ZucchiniOutdoors May 8 to Jun 18, and Jul 27 to Sep 5; Under cover Apr 10 to Oct 3

Sow outdoors: May 8 to Jun 18, and Jul 27 to Sep 5
Under cover: Apr 10 to Oct 3
First harvest: About 36 days after sowing. Sown on May 8, ready around June 13.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Zucchini across the US, town by town

CucumberOutdoors May 8 to Jun 18, and Jul 27 to Aug 31; Under cover Apr 10 to Sep 28

Sow outdoors: May 8 to Jun 18, and Jul 27 to Aug 31
Under cover: Apr 10 to Sep 28
First harvest: About 42 days after sowing. Sown on May 8, ready around June 19.
Warmth: Tender: needs days averaging 54°F or more, and no frost.

Cucumber across the US, town by town

Winter squashOutdoors May 8 to Jun 8, and Jul 27 to Aug 20; Under cover Apr 10 to Sep 17

Sow outdoors: May 8 to Jun 8, and Jul 27 to Aug 20
Under cover: Apr 10 to Sep 17
First harvest: About 66 days after sowing. Sown on May 8, 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 3 to Jun 8, and Jul 27 to Aug 21; Under cover Apr 5 to Sep 18

Sow outdoors: May 3 to Jun 8, and Jul 27 to Aug 21
Under cover: Apr 5 to Sep 18
First harvest: About 60 days after sowing. Sown on May 3, ready around July 2.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Sweet corn across the US, town by town

Roots

CarrotOutdoors Mar 21 to Jun 29, and Jul 27 to Aug 18; Under cover Feb 21 to Sep 15

Sow outdoors: Mar 21 to Jun 29, and Jul 27 to Aug 18
Under cover: Feb 21 to Sep 15
First harvest: About 72 days after sowing. Sown on March 21, ready around June 1.
Warmth: Hardy: grows once days average 45°F.

Carrot across the US, town by town

BeetOutdoors Mar 21 to Jul 4, and Jul 27 to Aug 31; Under cover Feb 21 to Sep 28

Sow outdoors: Mar 21 to Jul 4, and Jul 27 to Aug 31
Under cover: Feb 21 to Sep 28
First harvest: About 52 days after sowing. Sown on March 21, ready around May 12.
Warmth: Hardy: grows once days average 45°F.

Beet across the US, town by town

ParsnipOutdoors Mar 15 to May 31; Under cover Feb 15 to Jun 28

Sow outdoors: Mar 15 to May 31
Under cover: Feb 15 to Jun 28
First harvest: About 88 days after sowing. Sown on March 15, ready around June 11.
Warmth: Hardy: grows once days average 43°F.

Parsnip across the US, town by town

RadishOutdoors Mar 15 to May 9, and Aug 14 to Oct 7; Under cover Feb 15 to Jun 6, and Jul 17 to Nov 4

Sow outdoors: Mar 15 to May 9, and Aug 14 to Oct 7
Under cover: Feb 15 to Jun 6, and Jul 17 to Nov 4
First harvest: About 20 days after sowing. Sown on March 15, ready around April 4.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Radish across the US, town by town

PotatoOutdoors Mar 15 to May 10, and Jul 27 to Aug 19; Under cover Feb 15 to Jun 7, and Jun 29 to Sep 16

Plant outdoors: Mar 15 to May 10, and Jul 27 to Aug 19
Under cover: Feb 15 to Jun 7, and Jun 29 to Sep 16
First harvest: About 68 days after planting. Planted on March 15, ready around May 22.
Warmth: Hardy: grows once days average 43°F.

Potato across the US, town by town

TurnipOutdoors Mar 15 to May 17, and Aug 8 to Sep 11; Under cover Feb 15 to Jun 14, and Jul 11 to Oct 9

Sow outdoors: Mar 15 to May 17, and Aug 8 to Sep 11
Under cover: Feb 15 to Jun 14, and Jul 11 to Oct 9
First harvest: About 40 days after sowing. Sown on March 15, ready around April 24.
Warmth: Hardy: grows once days average 43°F.

Turnip across the US, town by town

Leaves

LettuceOutdoors Mar 16 to May 3, and Aug 20 to Sep 7; Under cover Feb 16 to May 31, and Jul 23 to Aug 10, and Aug 20 to Sep 7, and Sep 17 to Oct 5

Sow outdoors: Mar 16 to May 3, and Aug 20 to Sep 7
Under cover: Feb 16 to May 31, and Jul 23 to Aug 10, and Aug 20 to Sep 7, and Sep 17 to Oct 5
First harvest: About 49 days after sowing. Sown on March 16, ready around May 4.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Lettuce across the US, town by town

SpinachOutdoors Mar 15 to May 3, and Aug 20 to Oct 1; Under cover Feb 15 to May 31, and Jul 23 to Oct 29

Sow outdoors: Mar 15 to May 3, and Aug 20 to Oct 1
Under cover: Feb 15 to May 31, and Jul 23 to Oct 29
First harvest: About 31 days after sowing. Sown on March 15, ready around April 15.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Spinach across the US, town by town

Swiss chardOutdoors Mar 21 to Sep 11; Under cover Feb 21 to Oct 9

Sow outdoors: Mar 21 to Sep 11
Under cover: Feb 21 to Oct 9
First harvest: About 45 days after sowing. Sown on March 21, ready around May 5.
Warmth: Hardy: grows once days average 45°F.

Swiss chard across the US, town by town

ArugulaOutdoors Mar 15 to May 3, and Aug 20 to Oct 2; Under cover Feb 15 to May 31, and Jul 23 to Oct 30

Sow outdoors: Mar 15 to May 3, and Aug 20 to Oct 2
Under cover: Feb 15 to May 31, and Jul 23 to Oct 30
First harvest: About 27 days after sowing. Sown on March 15, ready around April 11.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Arugula across the US, town by town

CeleryOutdoors Mar 11 to May 10, and Jul 27 to Aug 4; Under cover Feb 11 to Jun 7, and Jun 29 to Jul 7, and Jul 27 to Aug 4, and Aug 24 to Sep 1

Sow outdoors: Mar 11 to May 10, and Jul 27 to Aug 4
Under cover: Feb 11 to Jun 7, and Jun 29 to Jul 7, and Jul 27 to Aug 4, and Aug 24 to Sep 1
First harvest: About 84 days after sowing. Sown on March 11, ready around June 3.
Warmth: Hardy: grows once days average 41°F.

Celery across the US, town by town

Beans and peas

Runner beanOutdoors May 3 to Jun 18, and Jul 27 to Aug 25; Under cover Apr 5 to Sep 22

Sow outdoors: May 3 to Jun 18, and Jul 27 to Aug 25
Under cover: Apr 5 to Sep 22
First harvest: About 54 days after sowing. Sown on May 3, ready around June 26.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Runner bean across the US, town by town

Green beanOutdoors May 3 to Jul 3, and Jul 27 to Sep 3; Under cover Apr 5 to Oct 1

Sow outdoors: May 3 to Jul 3, and Jul 27 to Sep 3
Under cover: Apr 5 to Oct 1
First harvest: About 42 days after sowing. Sown on May 3, ready around June 14.
Warmth: Tender: needs days averaging 52°F or more, and no frost.

Green bean across the US, town by town

Fava beanOutdoors Oct 25 to Nov 17; Under cover Sep 27 to Dec 15

Sow outdoors: Oct 25 to Nov 17
Under cover: Sep 27 to Dec 15
First harvest: About 220 days after sowing. Sown on October 25, ready around June 2.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Fava bean across the US, town by town

PeaOutdoors Mar 15 to May 9, and Aug 14 to Aug 24; Under cover Feb 15 to Jun 6, and Jul 17 to Jul 27, and Aug 14 to Aug 24, and Sep 11 to Sep 21

Sow outdoors: Mar 15 to May 9, and Aug 14 to Aug 24
Under cover: Feb 15 to Jun 6, and Jul 17 to Jul 27, and Aug 14 to Aug 24, and Sep 11 to Sep 21
First harvest: About 54 days after sowing. Sown on March 15, ready around May 8.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Pea across the US, town by town

Onion family

OnionOutdoors Mar 13 to May 3; Under cover Feb 13 to May 31

Plant outdoors: Mar 13 to May 3
Under cover: Feb 13 to May 31
First harvest: About 93 days after planting. Planted on March 13, ready around June 14.
Warmth: Hardy: grows once days average 43°F.

Onion across the US, town by town

GarlicOutdoors Oct 25 to Nov 21; Under cover Sep 27 to Dec 19

Plant outdoors: Oct 25 to Nov 21
Under cover: Sep 27 to Dec 19
First harvest: About 250 days after planting. Planted on October 25, ready around July 2.
Warmth: Hardy: goes in as the weather cools, and grows on through winter.

Garlic across the US, town by town

LeekOutdoors Mar 15 to Jun 30, and Jul 27 to Aug 5; Under cover Feb 15 to Aug 5, and Aug 24 to Sep 2

Sow outdoors: Mar 15 to Jun 30, and Jul 27 to Aug 5
Under cover: Feb 15 to Aug 5, and Aug 24 to Sep 2
First harvest: About 100 days after sowing. Sown on March 15, ready around June 23.
Warmth: Hardy: grows once days average 43°F.

Leek across the US, town by town

ScallionOutdoors Mar 11 to Sep 20; Under cover Feb 11 to Oct 18

Sow outdoors: Mar 11 to Sep 20
Under cover: Feb 11 to Oct 18
First harvest: About 43 days after sowing. Sown on March 11, ready around April 23.
Warmth: Hardy: grows once days average 41°F.

Scallion across the US, town by town

ShallotOutdoors Mar 8 to May 21, and Jul 27 to Aug 4; Under cover Feb 8 to Jun 18, and Jun 29 to Jul 7, and Jul 27 to Aug 4, and Aug 24 to Sep 1

Plant outdoors: Mar 8 to May 21, and Jul 27 to Aug 4
Under cover: Feb 8 to Jun 18, and Jun 29 to Jul 7, and Jul 27 to Aug 4, and Aug 24 to Sep 1
First harvest: About 78 days after planting. Planted on March 8, ready around May 25.
Warmth: Hardy: grows once days average 41°F.

Shallot across the US, town by town

Brassicas

CabbageOutdoors Mar 15 to Jun 5, and Jul 27 to Aug 17; Under cover Feb 15 to Sep 14

Sow outdoors: Mar 15 to Jun 5, and Jul 27 to Aug 17
Under cover: Feb 15 to Sep 14
First harvest: About 75 days after sowing. Sown on March 15, ready around May 29.
Warmth: Hardy: grows once days average 43°F.

Cabbage across the US, town by town

BroccoliOutdoors Mar 21 to Jun 5, and Jul 27 to Aug 19; Under cover Feb 21 to Sep 16

Sow outdoors: Mar 21 to Jun 5, and Jul 27 to Aug 19
Under cover: Feb 21 to Sep 16
First harvest: About 66 days after sowing. Sown on March 21, ready around May 26.
Warmth: Hardy: grows once days average 45°F.

Broccoli across the US, town by town

CauliflowerOutdoors Mar 15 to May 9; Under cover Feb 15 to Jun 6

Sow outdoors: Mar 15 to May 9
Under cover: Feb 15 to Jun 6
First harvest: About 81 days after sowing. Sown on March 15, ready around June 4.
Warmth: Hardy: grows once days average 43°F; bolts in hot weather.

Cauliflower across the US, town by town

Brussels sproutOutdoors Mar 15 to May 15; Under cover Feb 15 to Jun 12

Sow outdoors: Mar 15 to May 15
Under cover: Feb 15 to Jun 12
First harvest: About 116 days after sowing. Sown on March 15, ready around July 9.
Warmth: Hardy: grows once days average 43°F.

Brussels sprout across the US, town by town

KaleOutdoors Mar 21 to Jul 4, and Jul 27 to Aug 27; Under cover Feb 21 to Sep 24

Sow outdoors: Mar 21 to Jul 4, and Jul 27 to Aug 27
Under cover: Feb 21 to Sep 24
First harvest: About 59 days after sowing. Sown on March 21, ready around May 19.
Warmth: Hardy: grows once days average 45°F.

Kale across the US, town by town

Bok choyOutdoors Mar 26 to May 3, and Aug 20 to Sep 23; Under cover Feb 26 to May 31, and Jul 23 to Oct 21

Sow outdoors: Mar 26 to May 3, and Aug 20 to Sep 23
Under cover: Feb 26 to May 31, and Jul 23 to Oct 21
First harvest: About 36 days after sowing. Sown on March 26, ready around May 1.
Warmth: Hardy: grows once days average 46°F; bolts in hot weather.

Bok choy across the US, town by town

Herbs

BasilOutdoors Apr 4 to Jul 4, and Jul 27 to Sep 6; Under cover Mar 7 to Oct 4

Sow outdoors: Apr 4 to Jul 4, and Jul 27 to Sep 6
Under cover: Mar 7 to Oct 4
First harvest: About 42 days after sowing. Sown on April 4, 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 15 to Sep 9; Under cover Feb 15 to Oct 7

Sow outdoors: Mar 15 to Sep 9
Under cover: Feb 15 to Oct 7
First harvest: About 51 days after sowing. Sown on March 15, ready around May 5.
Warmth: Hardy: grows once days average 43°F.

Parsley across the US, town by town

CilantroOutdoors Mar 21 to May 3, and Aug 20 to Sep 22; Under cover Feb 21 to May 31, and Jul 23 to Oct 20

Sow outdoors: Mar 21 to May 3, and Aug 20 to Sep 22
Under cover: Feb 21 to May 31, and Jul 23 to Oct 20
First harvest: About 37 days after sowing. Sown on March 21, ready around April 27.
Warmth: Hardy: grows once days average 45°F; bolts in hot weather.

Cilantro across the US, town by town

ChivesOutdoors Mar 15 to May 31, and Jul 27 to Aug 26; Under cover Feb 15 to Sep 23

Sow outdoors: Mar 15 to May 31, and Jul 27 to Aug 26
Under cover: Feb 15 to Sep 23
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 Mar 21 to Oct 10; Under cover Feb 21 to Nov 7

Sow outdoors: Mar 21 to Oct 10
Under cover: Feb 21 to Nov 7
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 15 to May 15, and Jul 27 to Aug 23; Under cover Feb 15 to Jun 12, and Jun 29 to Sep 20

Plant outdoors: Mar 15 to May 15, and Jul 27 to Aug 23
Under cover: Feb 15 to Jun 12, and Jun 29 to Sep 20
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 9 to Nov 28; Under cover Oct 12 to Oct 31, and Nov 9 to Nov 28, and Dec 7 to Dec 26

Plant outdoors: Nov 9 to Nov 28
Under cover: Oct 12 to Oct 31, and Nov 9 to Nov 28, and Dec 7 to Dec 26
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 Nov 1 to Nov 25; Under cover Oct 4 to Dec 23

Plant outdoors: Nov 1 to Nov 25
Under cover: Oct 4 to Dec 23
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 Olathe

When is the last frost in Olathe?

On average around April 4, and the first autumn frost comes around November 5. 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 Olathe?

Yes. Plant them outdoors May 9 to Jun 3, and Jul 27 to Aug 19, or under cover Apr 11 to Sep 16.

What can I sow in Olathe in November?

Outdoors: fava bean, garlic, raspberry, rhubarb. Under cover: mint.

How accurate are these dates?

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

Get these dates as reminders

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