Bloomington, Indiana planting calendar and frost dates
Bloomington is in USDA hardiness zone 6b. The last spring frost typically comes around April 15 and the first fall frost around October 26, giving about 192 frost-free days a year.
- Hardiness zone
- Zone 6b
- Typical last frost
- April 15
- Typical first frost
- October 26
- Frost-free season
- 192 days
Frost dates in Bloomington
Last spring frost
- March 31Risky: frost later than this in 9 years out of 10
- April 15Typical: a later frost in half of years
- May 3Safe: a later frost only 1 year in 10
First fall frost
- October 11Risky: frost earlier than this 1 year in 10
- October 26Typical: an earlier frost in half of years
- November 9Late: frost before this in 9 years out of 10
The growing season between the typical last and first frosts is about 192 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 April 2 and returns around November 4.
NOAA U.S. Climate Normals 1991-2020 for Bloomington Indiana Univ, 6.5 miles NW of the city center and 223 feet higher. 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 Bloomington
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, 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: beets, black-eyed susans, blackberries, blueberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, collard greens, figs, garlic, gladioli, grapes, grass seed, hollyhocks, kale, leeks, lettuce, onions, parsley, peas, poppies, radishes, ranunculus, raspberries, rhubarb, roses, spinach, strawberries, swiss chard, turnips, wildflowers
April
Start indoors: cantaloupes, cosmos, cucumbers, okra, pumpkins, ranunculus, watermelons, winter squash, zucchini
Plant or sow outdoors: asparagus, beets, black-eyed susans, blackberries, broccoli, cabbages, carrots, cauliflower, chives, cilantro, dahlias, dill, figs, garden mums, ginger, gladioli, grapes, green onions, kentucky bluegrass, lavenders, leeks, lettuce, lilies, marigolds, mints, nasturtiums, onions, oregano, parsley, perennial ryegrass, petunias, potatoes, radishes, ranunculus, rosemary, roses, sage, snapdragons, spinach, sunflowers, sweet corn, sweet peas, swiss chard, tall fescue, thyme, turnips
May
Start indoors: zinnias
Plant or sow outdoors: asparagus, basil, bermudagrass, cantaloupes, celery, centipedegrass, cosmos, cucumbers, eggplants, garden mums, ginger, green beans, green onions, kentucky bluegrass, okra, peanuts, peppers, perennial ryegrass, pumpkins, st. augustinegrass, sunflowers, sweet peas, sweet potatoes, tall fescue, tomatoes, watermelons, winter squash, zoysiagrass, zucchini
June
Plant or sow outdoors: bermudagrass, celery, centipedegrass, cosmos, green onions, okra, peanuts, st. augustinegrass, zinnias, zoysiagrass
July
Plant for fall: brussels sprouts, collard greens, lettuce, 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 Bloomington
Bloomington's 4 main ZIP codes take their frost dates from 2 different NOAA stations: the typical last frost ranges from April 15 in 47401 to April 17 in 47403. Every one of them is in zone 6b.
Planting dates for popular crops in Bloomington
| Plant | Start indoors | Plant or sow outdoors | Fall planting |
|---|---|---|---|
| Tomatoes | Mar 10 to 24 | May 5 to 19 | — |
| Strawberries | — | Mar 4 to 18 | — |
| Lettuce | Feb 18 to Mar 4 | Apr 8 to 22 | Jul 27 to Aug 31 |
| Cilantro | Mar 4 to 18 | Apr 15 to 22 | — |
| Basil | Mar 17 to 31 | May 5 to 12 | — |
| Potatoes | — | Apr 7 to 14 | — |
| Garlic | — | Mar 4 to 18 | Oct 26 to Nov 9 |
| Onions | Dec 24 to Feb 4 | Mar 18 to Apr 1 | — |
| Cucumbers | Apr 7 to 21 | May 5 to 19 | — |
| Pumpkins | Apr 7 to 21 | May 5 to 19 | — |
| Peppers | Feb 17 to Mar 17 | May 5 to 19 | — |
| Carrots | — | Mar 25 to Apr 15 | Aug 3 to 24 |
| Sweet Potatoes | — | May 22 to 29 | — |
| Watermelons | Mar 31 to Apr 14 | May 5 to 19 | — |
| Sweet Corn | — | Apr 15 to 29 | — |
| Green Beans | — | May 5 to 19 | — |
| Zucchini | Apr 7 to 21 | May 5 to 19 | — |
| Broccoli | Jan 28 to Feb 18 | Mar 18 to Apr 1 | Aug 10 to Sep 7 |
| Peas | — | Mar 4 to 18 | Aug 3 to 17 |
| Spinach | Mar 4 to 11 | Apr 8 to 22 | Aug 17 to Sep 21 |
| Sunflowers | — | Apr 15 to May 6 | — |
| Zinnias | May 11 to 18 | Jun 8 to 22 | — |
| Tulips | — | — | Sep 14 to Nov 9 |
| Daffodils | — | — | Sep 14 to Oct 26 |
| Grass Seed | — | Mar 4 to 18 | Sep 14 to 28 |
Nearby cities
- Columbus, IN zone 6b, last frost Apr 11
- Greenwood, IN zone 6a, last frost Apr 15
- Indianapolis city, IN zone 6a, last frost Apr 15
- Terre Haute, IN zone 6a, last frost Apr 16
- Lawrence, IN zone 6a, last frost Apr 15
- Carmel, IN zone 6a, last frost Apr 21
Planting in IndianaAbout zone 6bPrintable calendar for Bloomington
Questions
When is the last frost in Bloomington?
Around April 15 in a typical year, based on NOAA's 1991-2020 records for Bloomington Indiana Univ. There is still a 1 in 10 chance of frost after May 3.
What planting zone is Bloomington 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 Bloomington?
Start seeds indoors March 10 to 24 and set plants out May 5 to 19.
When is the first frost in Bloomington?
Around October 26 in a typical year, and before October 11 about 1 year in 10.