Maize planting and harvest calendar
Usual sowing and harvest windows across 41 jurisdictions, transcribed at the granularity the official source publishes. About maize
| Jurisdiction | Usual sowing | Usual harvest |
|---|---|---|
| Alabama | Mar 15 – May 18 (most active Mar 25 – Apr 25) | Aug 2 – Oct 15 (most active Aug 11 – Sep 20) |
| Arizona | Mar 10 – Jun 1 (most active Apr 1 – May 15) | Sep 1 – Dec 1 (most active Oct 1 – Nov 1) |
| Arkansas | Mar 26 – May 9 (most active Apr 1 – Apr 26) | Aug 16 – Oct 6 (most active Aug 23 – Sep 23) |
| California | Mar 15 – Jul 15 (most active Apr 1 – Jul 1) | Sep 1 – Nov 15 (most active Oct 1 – Nov 1) |
| Colorado | Apr 19 – May 29 (most active Apr 28 – May 20) | Sep 28 – Nov 22 (most active Oct 8 – Nov 13) |
| Delaware | Apr 12 – May 28 (most active Apr 30 – May 16) | Sep 10 – Nov 5 (most active Sep 20 – Oct 15) |
| Florida | Mar 1 – May 5 (most active Mar 15 – Apr 25) | Jul 15 – Oct 1 (most active Aug 1 – Sep 10) |
| Georgia | Mar 14 – May 4 (most active Mar 22 – Apr 21) | Aug 6 – Oct 7 (most active Aug 16 – Sep 22) |
| Idaho | Apr 21 – Jun 9 (most active May 5 – May 26) | Sep 29 – Nov 24 (most active Oct 20 – Nov 10) |
| Illinois | Apr 14 – Jun 5 (most active Apr 21 – May 23) | Sep 14 – Nov 20 (most active Sep 23 – Nov 5) |
| Indiana | Apr 20 – Jun 10 (most active May 1 – Jun 1) | Sep 15 – Nov 25 (most active Oct 1 – Nov 10) |
| Iowa | Apr 19 – May 26 (most active Apr 25 – May 18) | Sep 21 – Nov 21 (most active Oct 5 – Nov 9) |
| Kansas | Apr 5 – May 25 (most active Apr 15 – May 15) | Sep 1 – Nov 10 (most active Sep 10 – Oct 25) |
| Kentucky | Apr 6 – Jun 8 (most active Apr 14 – May 24) | Sep 1 – Nov 10 (most active Sep 9 – Oct 24) |
| Louisiana | Mar 13 – Apr 16 (most active Mar 19 – Apr 8) | Jul 31 – Sep 12 (most active Aug 9 – Sep 5) |
| Maryland | Apr 20 – Jun 7 (most active Apr 30 – May 20) | Sep 9 – Nov 17 (most active Sep 22 – Oct 22) |
| Michigan | Apr 21 – Jun 6 (most active May 1 – May 27) | Sep 5 – Dec 10 (most active Oct 10 – Nov 25) |
| Minnesota | Apr 22 – May 29 (most active Apr 26 – May 19) | Sep 27 – Nov 23 (most active Oct 8 – Nov 8) |
| Mississippi | Mar 17 – May 4 (most active Mar 24 – Apr 27) | Aug 11 – Oct 7 (most active Aug 23 – Sep 23) |
| Missouri | Apr 3 – Jun 12 (most active Apr 11 – May 27) | Aug 29 – Dec 22 (most active Sep 8 – Nov 3) |
| Montana | Apr 26 – Jun 4 (most active May 4 – May 28) | Oct 4 – Dec 8 (most active Oct 25 – Dec 3) |
| Nebraska | Apr 19 – May 21 (most active Apr 27 – May 15) | Sep 18 – Nov 20 (most active Oct 4 – Nov 10) |
| New Jersey | Apr 15 – Jun 15 (most active May 1 – May 20) | Sep 25 – Nov 15 (most active Oct 10 – Nov 1) |
| New Mexico | Apr 15 – May 20 (most active Apr 20 – May 10) | Sep 25 – Nov 20 (most active Oct 1 – Oct 30) |
| New York | Apr 20 – Jun 20 (most active May 4 – Jun 13) | Oct 7 – Nov 25 (most active Oct 14 – Nov 14) |
| North Carolina | Apr 1 – May 15 (most active Apr 10 – Apr 25) | Aug 25 – Nov 1 (most active Sep 10 – Oct 10) |
| North Dakota | Apr 26 – Jun 4 (most active May 2 – May 28) | Sep 28 – Dec 6 (most active Oct 8 – Nov 19) |
| Ohio | Apr 18 – May 30 (most active Apr 24 – May 24) | Sep 27 – Dec 1 (most active Oct 11 – Nov 20) |
| Oklahoma | Mar 21 – May 17 (most active Apr 2 – May 8) | Aug 20 – Oct 20 (most active Aug 29 – Oct 9) |
| Oregon | Mar 25 – Jun 15 (most active Apr 25 – Jun 5) | Oct 10 – Dec 5 (most active Oct 20 – Nov 20) |
| Pennsylvania | Apr 30 – Jun 15 (most active May 10 – May 25) | Sep 25 – Dec 10 (most active Oct 15 – Nov 20) |
| South Carolina | Mar 10 – May 15 (most active Mar 20 – Apr 20) | Jul 25 – Oct 10 (most active Aug 20 – Sep 25) |
| South Dakota | Apr 26 – Jun 10 (most active May 2 – May 27) | Sep 24 – Dec 3 (most active Oct 6 – Nov 16) |
| Tennessee | Apr 1 – May 25 (most active Apr 5 – May 10) | Aug 25 – Oct 30 (most active Sep 1 – Oct 10) |
| Texas | Mar 1 – May 17 (most active Mar 8 – May 7) | Jul 18 – Nov 8 (most active Aug 1 – Oct 11) |
| Utah | Apr 15 – Jun 5 (most active Apr 30 – May 20) | Sep 25 – Dec 10 (most active Oct 10 – Oct 30) |
| Virginia | Apr 5 – May 29 (most active Apr 11 – May 20) | Aug 31 – Nov 9 (most active Sep 6 – Oct 28) |
| Washington | Apr 10 – Jun 1 (most active Apr 20 – May 20) | Sep 25 – Nov 25 (most active Oct 5 – Nov 15) |
| West Virginia | Apr 20 – Jun 20 (most active May 1 – Jun 5) | Sep 15 – Dec 1 (most active Sep 30 – Nov 20) |
| Wisconsin | Apr 26 – Jun 4 (most active May 2 – May 27) | Oct 2 – Nov 28 (most active Oct 14 – Nov 17) |
| Wyoming | Apr 24 – Jun 6 (most active May 3 – May 21) | Oct 5 – Dec 10 (most active Oct 18 – Nov 24) |
Source
Dates are the usual planting and harvesting dates published by USDA NASS in the October 2010 edition of this handbook; they describe typical practice at that time and are not a current-season recommendation.
Tools for this
Each tool shows its formula, constants and sources, and starts empty — nothing is filled in from this page.
- Growing degree-days calculator
A calendar gives usual dates; degree-days give the heat accumulation behind them.
- Seed-rate calculator
Turn a planting decision into a seed rate.