Brownsburg, IN frost dates
Last spring frostApr 12median date
First fall frostOct 29median date
Growing season200 daysfrost-free
Hardiness zone6aZone 6a
How Brownsburg compares
- In 8 years out of 10, the last spring frost in Brownsburg falls between March 30 and April 29, a 30-day window. The first fall frost falls between October 16 and November 10.
- The median last frost is 10 days earlier than the Indiana median of Apr 22.
- Its 200-day growing season is longer than 89% of the 733 Indiana places with a regular frost season (state median 182 days).
- The last frost is 17 days earlier than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 106 nights a year at or below 32°F.
- Compared with Indianapolis, IN, 22 km away, the last frost here is 8 days earlier than there and the growing season is 16 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 30 |
| 50% (median) | April 12 |
| 10% (safe for tender plants) | April 29 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 16 |
| 50% (median) | October 29 |
| 90% (late) | November 10 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Brownsburg, IN
Brownsburg, IN frost dates — last frost Apr 12, first frost Oct 29, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Jan 18 to Feb 1Transplant outside: Mar 15 to Mar 29
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 26 to May 10
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 26 to May 10
Start indoors: Feb 15 to Mar 1Transplant outside: Apr 19 to May 3
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 22 to Apr 5Sow outdoors: Mar 15 to Apr 19Plant for fall: Sep 3 to Oct 1
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 15 to Mar 29Sow outdoors: Mar 15 to Mar 29Plant for fall: Aug 20 to Sep 10
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 23 to Aug 13
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 22 to Apr 5Plant for fall: Jul 23 to Aug 13
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 23 to Aug 13
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17Sow outdoors: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 19 to May 3
Sow outdoors: Mar 1 to Mar 22Plant for fall: Aug 6 to Aug 27
Sow outdoors: Mar 1 to Mar 22Plant for fall: Sep 3 to Sep 24
Sow outdoors: Mar 8 to Apr 19Plant for fall: Sep 17 to Oct 8
Start indoors: Mar 15 to Mar 22Transplant outside: Apr 26 to May 3Sow outdoors: Apr 19 to May 3Plant for fall: Aug 13 to Aug 27
Start indoors: Mar 15 to Mar 22Sow outdoors: Apr 19 to May 3Plant for fall: Aug 20 to Sep 3
Start indoors: Mar 15 to Mar 22Sow outdoors: Apr 19 to May 3
Start indoors: Mar 15 to Mar 22Transplant outside: Apr 26 to May 10
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 6 to Aug 20
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 20 to Sep 3
Sow outdoors: Mar 22 to Apr 12
Sow outdoors: Mar 29 to Apr 26Plant for fall: Aug 20 to Sep 3
Sow outdoors: Mar 29 to Apr 19Plant for fall: Sep 3 to Sep 24
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 13 to Aug 27
Sow outdoors: Apr 19 to May 3
Transplant outside: Apr 26 to May 17
Plant for fall: Oct 15 to Nov 19
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Brownsburg, IN
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 18 – Feb 1 | Mar 15 – Mar 29 | — | — |
| Peppers | Feb 1 – Feb 15 | Apr 26 – May 10 | — | — |
| Eggplant | Feb 1 – Feb 15 | Apr 26 – May 10 | — | — |
| Tomatoes | Feb 15 – Mar 1 | Apr 19 – May 3 | — | — |
| Lettuce | Feb 15 – Mar 1 | Mar 22 – Apr 5 | Mar 15 – Apr 19 | Sep 3 – Oct 1 |
| Kale | Feb 15 – Mar 1 | Mar 15 – Mar 29 | Mar 15 – Mar 29 | Aug 20 – Sep 10 |
| Broccoli | Feb 15 – Mar 1 | Mar 29 – Apr 12 | — | Jul 23 – Aug 13 |
| Cabbage | Feb 15 – Mar 1 | Mar 22 – Apr 5 | — | Jul 23 – Aug 13 |
| Cauliflower | Feb 15 – Mar 1 | Mar 29 – Apr 12 | — | Jul 23 – Aug 13 |
| Okra | Mar 1 – Mar 15 | May 3 – May 17 | May 3 – May 17 | — |
| Basil | Mar 1 – Mar 15 | Apr 19 – May 3 | — | — |
| Peas | — | — | Mar 1 – Mar 22 | Aug 6 – Aug 27 |
| Spinach | — | — | Mar 1 – Mar 22 | Sep 3 – Sep 24 |
| Radishes | — | — | Mar 8 – Apr 19 | Sep 17 – Oct 8 |
| Cucumbers | Mar 15 – Mar 22 | Apr 26 – May 3 | Apr 19 – May 3 | Aug 13 – Aug 27 |
| Zucchini & Summer Squash | Mar 15 – Mar 22 | — | Apr 19 – May 3 | Aug 20 – Sep 3 |
| Winter Squash & Pumpkins | Mar 15 – Mar 22 | — | Apr 19 – May 3 | — |
| Melons & Watermelon | Mar 15 – Mar 22 | Apr 26 – May 10 | — | — |
| Carrots | — | — | Mar 22 – Apr 19 | Aug 6 – Aug 20 |
| Beets | — | — | Mar 22 – Apr 19 | Aug 20 – Sep 3 |
| Potatoes | — | — | Mar 22 – Apr 12 | — |
| Swiss Chard | — | — | Mar 29 – Apr 26 | Aug 20 – Sep 3 |
| Cilantro | — | — | Mar 29 – Apr 19 | Sep 3 – Sep 24 |
| Green Beans | — | — | Apr 19 – May 10 | Aug 13 – Aug 27 |
| Sweet Corn | — | — | Apr 19 – May 3 | — |
| Sweet Potatoes | — | Apr 26 – May 17 | — | — |
| Garlic | — | — | — | Oct 15 – Nov 19 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Indianapolis Eagle Creek Ap, IN weather station, 8 km away (elevation 823 ft (251 m)).
Frost dates near Brownsburg
- Pittsboro Apr 23 · Oct 19
- Avon Apr 12 · Oct 29
- Lizton Apr 23 · Oct 19
- Zionsville Apr 21 · Oct 20
- Danville Apr 23 · Oct 19
- Whitestown Apr 21 · Oct 20
- Plainfield Apr 12 · Oct 27
- North Salem Apr 23 · Oct 19
- Clayton Apr 12 · Oct 27
- Indianapolis Apr 20 · Oct 21
Frequently asked questions
When is the last frost in Brownsburg, IN?
The median last spring frost in Brownsburg, IN is April 12. There is still about a 10% chance of frost after April 29, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Brownsburg, IN?
The median first fall frost is October 29, with about a 10% chance of frost before October 16.
How long is the growing season in Brownsburg, IN?
About 200 days between the median last spring frost and first fall frost.
What planting zone is Brownsburg, IN?
Brownsburg, IN is in USDA hardiness zone 6a.