When to plant Eggplant in Iowa, United States
Eggplant can be planted after May 29, when air temperature is consistently in a range between 55°F and 105°F and soil temperature is above 45°F.
Growing Eggplant in Iowa
Days suitable for growing Eggplant in Iowa
Iowa has on average 117 days, suitable for growing Eggplant. Eggplant needs on average between 65 and 80 days to mature and produce harvest. With 117 days suitable for growing, you can expect good harvest without too much effort if all planting activities are done in timely manner.
Eggplant seeds can be planted between May 29 and July 19. Planting before May 29 without any additional protection is not advised because cold streaks can damage or kill off young plant. When planting after July 19, Eggplant will not have enough time to mature and produce harvest.
Growing season extention
In order to maximize chances for a good harvest of Eggplant in Iowa, some extra steps can be taken to extend growing season.
Start seeds indoors
When starting seeds indoors, it is possible to guarantee best possible conditions for young seedlings. Consistent temperature range, adequate watering and ample light (natural, supplemented with artifitial grow lights) will ensure you have strong and healthy seedlings just in time for transplanting into soil.
It takes 42 days on average for Eggplant to sprout, and grow big enough to be ready for transplanting.
May 29 is on average first day in Iowa that has required temperatures for young Eggplant seedlings to grow, without worrying about cold damage.
Seeds can be started indoors beween April 17 and July 04, this way they will be ready just in time for transplanting on May 29.
Seedlings started after July 04 might not have enough time to mature and produce harvest.
Use a cold frame
When using a cold frame in a beggining of growing season You can protect young plants from possible temperature drops, this way growing season can start up to 2 weeks earlier.
Use an additional shading
On days, when air temperatures are expected to raise above 105°F, which is in top of tolerable range for Eggplant, consider using additional shading to prevent heat shock.
| Total frost free days | 172 |
| Last frost expected date | April 28 |
| First frost expected date | October 17 |
| Dates with ideal conditions | June 30 July 05 July 19 to July 20 (2 days) July 27 to July 28 (2 days) August 11 August 24 |
| Dates with suitable conditions | May 18 May 24 to May 27 (4 days) May 29 to September 22 (117 days) September 24 to September 27 (4 days) September 29 to October 02 (4 days) |
| Total days ideal for growing Eggplant in Iowa | 8 |
| Total days suitable for growing Eggplant in Iowa | 130 |
| Days needed for Eggplant to mature and produce harvest | 65 - 80 |
| Seed can be planted directly into soil | yes |
Notable temperature facts for growing Eggplant in Iowa
Table with days suitable to grow vegetables in Iowa
Tolerable temperature range for Eggplant: 55°F to 105°F
| Week | Average temperature | Possible min and max temperature | Suitable for Eggplant | |
|---|---|---|---|---|
| 1 | January 01 - January 03 | 16°F to 33°F | -6°F to 48°F | |
| 2 | January 04 - January 10 | 20°F to 35°F | -7°F to 52°F | |
| 3 | January 11 - January 17 | 22°F to 35°F | -4°F to 50°F | |
| 4 | January 18 - January 24 | 12°F to 27°F | -17°F to 40°F | |
| 5 | January 25 - January 31 | 8°F to 23°F | -27°F to 40°F | |
| 6 | February 01 - February 07 | 13°F to 31°F | -18°F to 49°F | |
| 7 | February 08 - February 14 | 11°F to 28°F | -16°F to 51°F | |
| 8 | February 15 - February 21 | 11°F to 32°F | -19°F to 57°F | |
| 9 | February 22 - February 28 | 18°F to 36°F | -6°F to 58°F | |
| 10 | March 01 - March 07 | 23°F to 44°F | -11°F to 63°F | |
| 11 | March 08 - March 14 | 30°F to 47°F | 7°F to 69°F | |
| 12 | March 15 - March 21 | 30°F to 50°F | 9°F to 69°F | |
| 13 | March 22 - March 28 | 34°F to 51°F | 21°F to 67°F | |
| 14 | March 29 - April 04 | 35°F to 56°F | 22°F to 77°F | |
| 15 | April 05 - April 11 | 41°F to 62°F | 23°F to 76°F | |
| 16 | April 12 - April 18 | 36°F to 56°F | 21°F to 79°F | |
| 17 | April 19 - April 25 | 41°F to 61°F | 25°F to 78°F | |
| 18 | April 26 - May 02 | 45°F to 65°F | 28°F to 84°F | |
| 19 | May 03 - May 09 | 47°F to 66°F | 37°F to 86°F | |
| 20 | May 10 - May 16 | 51°F to 70°F | 33°F to 89°F | |
| 21 | May 17 - May 23 | 54°F to 71°F | 41°F to 84°F | |
| 22 | May 24 - May 30 | 57°F to 75°F | 40°F to 87°F | TRUE |
| 23 | May 31 - June 06 | 61°F to 80°F | 49°F to 89°F | TRUE |
| 24 | June 07 - June 13 | 62°F to 81°F | 49°F to 92°F | TRUE |
| 25 | June 14 - June 20 | 64°F to 84°F | 57°F to 97°F | TRUE |
| 26 | June 21 - June 27 | 65°F to 82°F | 52°F to 92°F | TRUE |
| 27 | June 28 - July 04 | 68°F to 85°F | 61°F to 92°F | TRUE |
| 28 | July 05 - July 11 | 67°F to 83°F | 55°F to 93°F | TRUE |
| 29 | July 12 - July 18 | 66°F to 84°F | 58°F to 93°F | TRUE |
| 30 | July 19 - July 25 | 68°F to 85°F | 58°F to 95°F | TRUE |
| 31 | July 26 - August 01 | 68°F to 85°F | 59°F to 95°F | TRUE |
| 32 | August 02 - August 08 | 66°F to 83°F | 55°F to 95°F | TRUE |
| 33 | August 09 - August 15 | 66°F to 83°F | 56°F to 90°F | TRUE |
| 34 | August 16 - August 22 | 65°F to 83°F | 56°F to 94°F | TRUE |
| 35 | August 23 - August 29 | 68°F to 85°F | 57°F to 98°F | TRUE |
| 36 | August 30 - September 05 | 63°F to 81°F | 54°F to 94°F | TRUE |
| 37 | September 06 - September 12 | 61°F to 78°F | 47°F to 91°F | TRUE |
| 38 | September 13 - September 19 | 60°F to 79°F | 48°F to 87°F | TRUE |
| 39 | September 20 - September 26 | 58°F to 76°F | 47°F to 92°F | TRUE |
| 40 | September 27 - October 03 | 58°F to 75°F | 40°F to 89°F | TRUE |
| 41 | October 04 - October 10 | 51°F to 69°F | 36°F to 83°F | |
| 42 | October 11 - October 17 | 45°F to 62°F | 32°F to 79°F | |
| 43 | October 18 - October 24 | 44°F to 61°F | 26°F to 80°F | |
| 44 | October 25 - October 31 | 36°F to 50°F | 23°F to 69°F | |
| 45 | November 01 - November 07 | 37°F to 56°F | 17°F to 73°F | |
| 46 | November 08 - November 14 | 34°F to 50°F | 6°F to 71°F | |
| 47 | November 15 - November 21 | 32°F to 49°F | 16°F to 65°F | |
| 48 | November 22 - November 28 | 28°F to 44°F | 14°F to 56°F | |
| 49 | November 29 - December 05 | 28°F to 44°F | 15°F to 58°F | |
| 50 | December 06 - December 12 | 26°F to 41°F | 12°F to 57°F | |
| 51 | December 13 - December 19 | 23°F to 37°F | 6°F to 69°F | |
| 52 | December 20 - December 26 | 22°F to 38°F | -14°F to 55°F | |
| 53 | December 27 - December 31 | 23°F to 37°F | -5°F to 53°F |
Days with suitable temperature for growing Eggplant in Iowa
For more precise weather statisctics and planting information, please select a County in Iowa.
Adair County
Adams County
Allamakee County
Appanoose County
Audubon County
Benton County
Black Hawk County
Boone County
Bremer County
Buchanan County
Buena Vista County
Butler County
Calhoun County
Carroll County
Cass County
Cedar County
Cerro Gordo County
Cherokee County
Chickasaw County
Clarke County
Clay County
Clayton County
Clinton County
Crawford County
Dallas County
Davis County
Decatur County
Delaware County
Des Moines County
Dickinson County
Dubuque County
Emmet County
Fayette County
Floyd County
Franklin County
Fremont County
Greene County
Grundy County
Guthrie County
Hamilton County
Hancock County
Hardin County
Harrison County
Henry County
Howard County
Humboldt County
Ida County
Iowa County
Jackson County
Jasper County
Jefferson County
Johnson County
Jones County
Keokuk County
Kossuth County
Lee County
Linn County
Louisa County
Lucas County
Lyon County
Madison County
Mahaska County
Marion County
Marshall County
Mills County
Mitchell County
Monona County
Monroe County
Montgomery County
Muscatine County
O'Brien County
Osceola County
Page County
Palo Alto County
Plymouth County
Pocahontas County
Polk County
Pottawattamie County
Poweshiek County
Ringgold County
Sac County
Scott County
Shelby County
Sioux County
Story County
Tama County
Taylor County
Union County
Van Buren County
Wapello County
Warren County
Washington County
Wayne County
Webster County
Winnebago County
Winneshiek County
Woodbury County
Worth County
Wright County
All data is provided “as is” without warranty or any representation of accuracy, timeliness or completeness.
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Average daily temperatures were calculated using
