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
January
Start indoors: broccoli, cauliflower, collard greens, kale, leeks, onions, petunias, ranunculus
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
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
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
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
June
Plant or sow outdoors: bermudagrass, centipedegrass, green onions, okra, st. augustinegrass, zinnias, zoysiagrass
July
Plant for fall: bearded irises, brussels sprouts, carrots, collard greens, lettuce, peas, snapdragons, swiss chard
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
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
October
Plant for fall: crocuses, daffodils, daylilies, garlic, hyacinths, lilies, ornamental alliums, peonies, tulips
November
Plant for fall: crocuses, garlic, hyacinths, ornamental alliums, tulips
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 code | Zone | Weather station | Typical last frost | Typical first frost |
|---|---|---|---|---|
| 66604 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66605 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66606 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66607 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66608 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66609 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66610 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66611 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66614 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66616 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
| 66618 | 6b | Topeka Muni Airport, 3.2 mi ENE | Apr 12 | Oct 23 |
Planting dates for popular crops in Topeka
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Mar 6 to 20 | May 1 to 15 | — |
| Strawberries | — | Mar 1 to 15 | — |
| Lettuce | Feb 15 to Mar 1 | Apr 5 to 19 | Jul 24 to Aug 28 |
| Cilantro | Mar 1 to 15 | Apr 12 to 19 | — |
| Basil | Mar 13 to 27 | May 1 to 8 | — |
| Potatoes | — | Mar 29 to Apr 5 | — |
| Garlic | — | Mar 1 to 15 | Oct 23 to Nov 6 |
| Onions | Dec 21 to Feb 1 | Mar 15 to 29 | — |
| Cucumbers | Apr 3 to 17 | May 1 to 15 | — |
| Pumpkins | Apr 3 to 17 | May 1 to 15 | — |
| Peppers | Feb 13 to Mar 13 | May 1 to 15 | — |
| Carrots | — | Mar 22 to Apr 12 | Jul 31 to Aug 21 |
| Sweet Potatoes | — | May 15 to 22 | — |
| Watermelons | Mar 27 to Apr 10 | May 1 to 15 | — |
| Sweet Corn | — | Apr 12 to 26 | — |
| Green Beans | — | May 1 to 15 | — |
| Zucchini | Apr 3 to 17 | May 1 to 15 | — |
| Broccoli | Jan 25 to Feb 15 | Mar 15 to 29 | Aug 7 to Sep 4 |
| Peas | — | Mar 1 to 15 | Jul 31 to Aug 14 |
| Spinach | Mar 1 to 8 | Apr 5 to 19 | Aug 14 to Sep 18 |
| Sunflowers | — | Apr 12 to May 3 | — |
| Zinnias | Apr 30 to May 7 | May 28 to Jun 11 | — |
| Tulips | — | — | Sep 11 to Nov 6 |
| Daffodils | — | — | Sep 11 to Oct 23 |
| Grass Seed | — | Mar 1 to 15 | Sep 11 to 25 |
Nearby cities
- Lawrence, KS zone 6b, last frost Apr 15
- Shawnee, KS zone 6b, last frost Apr 16
- Lenexa, KS zone 6b, last frost Apr 8
- Olathe, KS zone 6b, last frost Apr 8
- Manhattan, KS zone 6a, last frost Apr 19
- Kansas City, KS zone 6b, last frost Apr 4
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.