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Topeka, Kansas planting calendar and frost dates

Topeka is in USDA hardiness zone 6b. The last spring frost typically comes around April 12 and the first fall frost around October 23, giving about 191 frost-free days a year.

Hardiness zone
Zone 6b
Typical last frost
April 12
Typical first frost
October 23
Frost-free season
191 days

Frost dates in Topeka

Last spring frost

  • March 29Risky: frost later than this in 9 years out of 10
  • April 12Typical: a later frost in half of years
  • April 27Safe: a later frost only 1 year in 10

First fall frost

  • October 8Risky: frost earlier than this 1 year in 10
  • October 23Typical: an earlier frost in half of years
  • November 4Late: frost before this in 9 years out of 10

The growing season between the typical last and first frosts is about 191 days. Frost here means a low of 32°F at the weather station. A hard freeze (28°F), which damages most hardy crops too, typically ends around March 31 and returns around November 1.

NOAA U.S. Climate Normals 1991-2020 for Topeka Muni Airport, 3.2 miles ENE of the city center. Low-lying and rural spots often frost later in spring and earlier in fall than airports and city centers.

What to plant each month in Topeka

  1. January

    Start indoors: broccoli, cauliflower, collard greens, kale, leeks, onions, petunias, ranunculus

  2. February

    Start indoors: black-eyed susans, broccoli, cabbages, cauliflower, celery, chives, collard greens, eggplants, ginger, kale, leeks, lettuce, marigolds, onions, oregano, parsley, peppers, petunias, ranunculus, rosemary, sage, snapdragons

  3. March

    Start indoors: basil, black-eyed susans, cabbages, cantaloupes, celery, chives, cilantro, collard greens, eggplants, ginger, lettuce, marigolds, nasturtiums, peppers, ranunculus, sage, snapdragons, spinach, swiss chard, tomatoes, watermelons

    Plant or sow outdoors: asparagus, beets, black-eyed susans, blackberries, blueberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, dahlias, dill, figs, garlic, gladioli, grapes, grass seed, green onions, hollyhocks, kale, leeks, lettuce, onions, parsley, peas, poppies, potatoes, radishes, ranunculus, raspberries, rhubarb, roses, snapdragons, spinach, strawberries, swiss chard, turnips, wildflowers

  4. April

    Start indoors: cantaloupes, cosmos, cucumbers, okra, pumpkins, watermelons, winter squash, zinnias, zucchini

    Plant or sow outdoors: asparagus, beets, carrots, cauliflower, chives, cilantro, dahlias, dill, figs, garden mums, ginger, gladioli, grapes, green onions, kentucky bluegrass, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, oregano, parsley, perennial ryegrass, petunias, potatoes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, sweet peas, swiss chard, tall fescue, thyme

  5. May

    Start indoors: zinnias

    Plant or sow outdoors: asparagus, basil, bermudagrass, cantaloupes, celery, centipedegrass, cosmos, cucumbers, eggplants, garden mums, ginger, green beans, green onions, okra, peanuts, peppers, pumpkins, st. augustinegrass, sunflowers, sweet potatoes, tomatoes, watermelons, winter squash, zinnias, zoysiagrass, zucchini

  6. June

    Plant or sow outdoors: bermudagrass, centipedegrass, green onions, okra, st. augustinegrass, zinnias, zoysiagrass

  7. July

    Plant for fall: bearded irises, brussels sprouts, carrots, collard greens, lettuce, peas, snapdragons, swiss chard

  8. August

    Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, carrots, cauliflower, clematis, collard greens, coneflowers, daylilies, hostas, hydrangeas, kale, lettuce, peas, radishes, roses, saffron, snapdragons, spinach, swiss chard, turnips

  9. September

    Plant for fall: azaleas, bearded irises, beets, broccoli, cabbages, cauliflower, clematis, coneflowers, crocuses, daffodils, daylilies, grass seed, hostas, hyacinths, hydrangeas, kale, kentucky bluegrass, lilies, ornamental alliums, peonies, perennial ryegrass, radishes, roses, saffron, spinach, tall fescue, tulips, turnips

  10. October

    Plant for fall: crocuses, daffodils, daylilies, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips

  11. November

    Plant for fall: crocuses, garlic, hyacinths, ornamental alliums, tulips

  12. December

    Start indoors: onions

Frost dates and zones by ZIP code in Topeka

All 11 of Topeka's main ZIP codes take their frost dates from Topeka Muni Airport, so the dates on this page apply across the city. Every one of them is in zone 6b.

ZIP codeZoneWeather stationTypical last frostTypical first frost
666046bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666056bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666066bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666076bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666086bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666096bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666106bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666116bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666146bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666166bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23
666186bTopeka Muni Airport, 3.2 mi ENEApr 12Oct 23

Planting dates for popular crops in Topeka

PlantStart indoorsPlant or sow outdoorsFall planting
TomatoesMar 6 to 20May 1 to 15—
Strawberries—Mar 1 to 15—
LettuceFeb 15 to Mar 1Apr 5 to 19Jul 24 to Aug 28
CilantroMar 1 to 15Apr 12 to 19—
BasilMar 13 to 27May 1 to 8—
Potatoes—Mar 29 to Apr 5—
Garlic—Mar 1 to 15Oct 23 to Nov 6
OnionsDec 21 to Feb 1Mar 15 to 29—
CucumbersApr 3 to 17May 1 to 15—
PumpkinsApr 3 to 17May 1 to 15—
PeppersFeb 13 to Mar 13May 1 to 15—
Carrots—Mar 22 to Apr 12Jul 31 to Aug 21
Sweet Potatoes—May 15 to 22—
WatermelonsMar 27 to Apr 10May 1 to 15—
Sweet Corn—Apr 12 to 26—
Green Beans—May 1 to 15—
ZucchiniApr 3 to 17May 1 to 15—
BroccoliJan 25 to Feb 15Mar 15 to 29Aug 7 to Sep 4
Peas—Mar 1 to 15Jul 31 to Aug 14
SpinachMar 1 to 8Apr 5 to 19Aug 14 to Sep 18
Sunflowers—Apr 12 to May 3—
ZinniasApr 30 to May 7May 28 to Jun 11—
Tulips——Sep 11 to Nov 6
Daffodils——Sep 11 to Oct 23
Grass Seed—Mar 1 to 15Sep 11 to 25

Nearby cities

Planting in KansasAbout zone 6bPrintable calendar for Topeka

Questions

When is the last frost in Topeka?

Around April 12 in a typical year, based on NOAA's 1991-2020 records for Topeka Muni Airport. There is still a 1 in 10 chance of frost after April 27.

What planting zone is Topeka in?

USDA hardiness zone 6b (2023 map). The zone tells you which perennials survive the winter; planting dates depend on frost dates instead.

When should I plant tomatoes in Topeka?

Start seeds indoors March 6 to 20 and set plants out May 1 to 15.

When is the first frost in Topeka?

Around October 23 in a typical year, and before October 8 about 1 year in 10.