The rules we use
- Frost
- Hardy. Can go in 5 weeks before the average last frost and stands about 2 weeks of autumn frost.
- Soil warm enough
- Weekly mean around 5°C41°F or more
- Heat limit
- Average highs above 27°C81°F while it matures (it bolts)
- Days to harvest
- About 28 days from sowing in warm weather; longer when it is cool
- Picking
- About 2 weeks from one planting
General guidance, kept on the cautious side. Varieties differ: check the seed packet. How the dates are worked out.
At a glance
Radishes: city by city
Sorted from the earliest start after midwinter to the latest. Southern-hemisphere cities follow, with their seasons six months on.
Sow indoorsSow or plant outdoorsHarvestFrost seasonToday
Northern hemisphere
Southern hemisphere
Swipe sideways to see the whole year →
Dates
| City | Sow outdoors | Harvest |
|---|---|---|
| Tucson Arizona | Jan 1 – Mar 13, Oct 25 – Nov 19 | Feb 8 – Apr 18, Nov 17 – Dec 23 |
| San Francisco California | Jan 1 – Dec 31 | Jan 1 – Dec 31 |
| Austin Texas | Jan 16 – Mar 30, Oct 11 – Nov 13 | Feb 23 – May 3, Nov 1 – Dec 17 |
| San Antonio Texas | Jan 16 – Mar 22, Oct 14 – Nov 16 | Feb 20 – Apr 25, Nov 4 – Dec 17 |
| Dallas Texas | Jan 26 – Apr 8, Oct 5 – Nov 6 | Mar 9 – May 12, Oct 26 – Dec 13 |
| El Paso Texas | Jan 26 – Mar 25, Oct 11 – Oct 29 | Mar 12 – May 1, Nov 3 – Dec 4 |
| Memphis Tennessee | Feb 9 – Apr 24, Sep 23 – Oct 22 | Mar 31 – May 28, Oct 14 – Nov 30 |
| Birmingham Alabama | Feb 14 – Apr 13, Sep 28 – Oct 22 | Mar 26 – May 18, Oct 19 – Nov 25 |
| Little Rock Arkansas | Feb 14 – Apr 18, Sep 26 – Oct 21 | Mar 28 – May 22, Oct 17 – Nov 24 |
| Atlanta Georgia | Feb 17 – Apr 23, Sep 12 – Oct 20 | Mar 29 – May 27, Oct 3 – Nov 22 |
| Portland Oregon | Feb 21 – Jun 30, Aug 10 – Oct 5 | Apr 23 – Aug 3, Aug 31 – Dec 3 |
| Charlotte North Carolina | Feb 23 – Apr 22, Sep 13 – Oct 16 | Apr 4 – May 26, Oct 4 – Nov 17 |
| Raleigh North Carolina | Feb 24 – Apr 26, Sep 11 – Oct 16 | Apr 7 – May 30, Oct 2 – Nov 18 |
| Nashville Tennessee | Feb 24 – Apr 22, Sep 23 – Oct 14 | Apr 8 – May 27, Oct 15 – Nov 17 |
| Tulsa Oklahoma | Feb 24 – Apr 26, Sep 23 – Oct 15 | Apr 7 – May 30, Oct 14 – Nov 18 |
| Richmond Virginia | Feb 27 – Apr 28, Sep 11 – Oct 14 | Apr 13 – Jun 2, Oct 2 – Nov 18 |
| Louisville Kentucky | Feb 27 – May 4, Sep 11 – Oct 10 | Apr 18 – Jun 7, Oct 2 – Nov 17 |
| Oklahoma City Oklahoma | Feb 28 – Apr 22, Sep 23 – Oct 15 | Apr 7 – May 26, Oct 14 – Nov 16 |
| Washington District of Columbia | Mar 1 – May 9, Sep 5 – Oct 15 | Apr 21 – Jun 12, Sep 26 – Dec 2 |
| London England | Mar 1 – Oct 8 | May 1 – Dec 5 |
| Albuquerque New Mexico | Mar 2 – Apr 19, Sep 18 – Oct 8 | Apr 16 – May 27, Oct 10 – Nov 17 |
| St. Louis Missouri | Mar 4 – May 2, Sep 12 – Oct 6 | Apr 21 – Jun 5, Oct 3 – Nov 9 |
| Seattle Washington | Mar 4 – Oct 2 | May 4 – Dec 1 |
| Baltimore Maryland | Mar 5 – May 10, Sep 3 – Oct 15 | Apr 23 – Jun 13, Sep 24 – Dec 5 |
| Salt Lake City Utah | Mar 5 – May 13, Sep 12 – Sep 29 | May 1 – Jun 18, Oct 5 – Nov 14 |
| Kansas City Missouri | Mar 6 – May 7, Sep 10 – Oct 6 | Apr 23 – Jun 10, Oct 1 – Nov 16 |
| Vancouver British Columbia | Mar 6 – Sep 26 | May 6 – Nov 19 |
| Bristol England | Mar 7 – Oct 8 | May 7 – Dec 6 |
| Cardiff Wales | Mar 7 – Oct 10 | May 7 – Dec 9 |
| Manchester England | Mar 8 – Oct 2 | May 8 – Nov 30 |
| Philadelphia Pennsylvania | Mar 11 – May 13, Sep 1 – Oct 11 | Apr 29 – Jun 16, Sep 22 – Nov 24 |
| Cincinnati Ohio | Mar 12 – May 8, Sep 5 – Oct 4 | Apr 27 – Jun 11, Sep 26 – Nov 8 |
| Belfast Northern Ireland | Mar 13 – Sep 25 | May 13 – Nov 21 |
| Dublin Ireland | Mar 13 – Sep 29 | May 13 – Nov 24 |
| Columbus Ohio | Mar 16 – May 15, Aug 28 – Oct 1 | May 3 – Jun 18, Sep 18 – Nov 10 |
| Indianapolis Indiana | Mar 16 – May 15, Aug 30 – Oct 2 | May 2 – Jun 18, Sep 20 – Nov 9 |
| Birmingham England | Mar 16 – Sep 27 | May 16 – Nov 24 |
| New York New York | Mar 17 – May 30, Aug 14 – Oct 12 | May 6 – Jul 3, Sep 4 – Dec 4 |
| Pittsburgh Pennsylvania | Mar 18 – May 13, Aug 27 – Oct 1 | May 5 – Jun 17, Sep 17 – Nov 11 |
| Omaha Nebraska | Mar 20 – May 16, Aug 27 – Sep 27 | May 5 – Jun 19, Sep 17 – Nov 4 |
| Boise Idaho | Mar 20 – May 23, Sep 9 – Sep 25 | May 8 – Jun 28, Oct 3 – Nov 4 |
| Glasgow Scotland | Mar 22 – Sep 20 | May 22 – Nov 17 |
| Des Moines Iowa | Mar 23 – May 19, Aug 23 – Sep 26 | May 7 – Jun 22, Sep 13 – Nov 3 |
| Spokane Washington | Mar 24 – Jun 10, Aug 22 – Sep 13 | May 19 – Jul 15, Sep 13 – Oct 29 |
| Cleveland Ohio | Mar 26 – May 28, Aug 16 – Oct 2 | May 12 – Jul 1, Sep 6 – Nov 26 |
| Chicago Illinois | Mar 27 – Jun 3, Aug 8 – Sep 28 | May 14 – Jul 7, Aug 29 – Nov 14 |
| Edinburgh Scotland | Mar 28 – Sep 19 | May 28 – Nov 14 |
| Boston Massachusetts | Mar 29 – Jun 4, Aug 15 – Oct 1 | May 17 – Jul 8, Sep 5 – Nov 23 |
| Denver Colorado | Mar 30 – May 15, Sep 3 – Sep 19 | May 15 – Jun 21, Sep 25 – Oct 22 |
| Billings Montana | Mar 30 – May 29, Aug 30 – Sep 12 | May 21 – Jul 5, Sep 23 – Oct 21 |
| Detroit Michigan | Mar 31 – Jun 3, Aug 6 – Sep 28 | May 16 – Jul 7, Aug 27 – Nov 14 |
| Milwaukee Wisconsin | Apr 3 – Jun 15, Jul 28 – Sep 23 | May 22 – Jul 19, Aug 18 – Nov 12 |
| Minneapolis Minnesota | Apr 4 – May 26, Aug 8 – Sep 19 | May 18 – Jun 29, Aug 29 – Nov 1 |
| Madison Wisconsin | Apr 7 – Jun 5, Aug 4 – Sep 18 | May 23 – Jul 9, Aug 25 – Oct 24 |
| Portland Maine | Apr 8 – Jun 30, Jul 24 – Sep 18 | May 27 – Aug 3, Aug 14 – Oct 29 |
| Toronto Ontario | Apr 9 – Sep 18 | May 26 – Oct 23 |
| Buffalo New York | Apr 10 – Sep 26 | May 26 – Nov 9 |
| Fargo North Dakota | Apr 14 – Jun 2, Aug 8 – Sep 9 | May 26 – Jul 6, Aug 29 – Oct 14 |
| Burlington Vermont | Apr 15 – Jun 30, Jul 26 – Sep 19 | May 30 – Aug 3, Aug 16 – Oct 29 |
| Montreal Quebec | Apr 15 – Jun 23, Jul 29 – Sep 15 | May 27 – Jul 27, Aug 19 – Oct 23 |
| Ottawa Ontario | Apr 17 – Jun 29, Jul 25 – Sep 12 | May 29 – Aug 2, Aug 15 – Oct 16 |
| Halifax Nova Scotia | Apr 21 – Sep 18 | Jun 11 – Oct 31 |
| Calgary Alberta | Apr 22 – Aug 21 | Jun 12 – Sep 24 |
| Edmonton Alberta | Apr 24 – Aug 24 | Jun 9 – Oct 3 |
| Winnipeg Manitoba | Apr 24 – Jun 20, Jul 27 – Sep 1 | Jun 5 – Jul 24, Aug 17 – Oct 6 |
| Anchorage Alaska | Apr 27 – Aug 18 | Jun 13 – Oct 13 |
| San Diego California | Aug 15 – Jul 29 | Sep 5 – Sep 1 |
| Charleston South Carolina | Sep 19 – Apr 21 | Oct 10 – May 25 |
| San Jose California | Sep 24 – May 19 | Oct 15 – Jun 22 |
| Jacksonville Florida | Sep 30 – Mar 30 | Oct 21 – May 3 |
| Sacramento California | Oct 5 – Apr 24 | Oct 27 – May 29 |
| New Orleans Louisiana | Oct 8 – Mar 31 | Oct 29 – May 4 |
| Los Angeles California | Oct 9 – May 29 | Oct 30 – Jul 2 |
| Fresno California | Dec 10 – Apr 10, Oct 12 – Nov 19 | Nov 4 – Feb 1, Feb 9 – May 15 |
| Houston Texas | Oct 14 – Mar 30 | Nov 4 – May 3 |
| Las Vegas Nevada | Dec 7 – Mar 28, Oct 15 – Nov 24 | Nov 7 – May 2 |
| Orlando Florida | Oct 20 – Mar 10 | Nov 10 – Apr 13 |
| Tampa Florida | Oct 21 – Mar 16 | Nov 11 – Apr 19 |
| Phoenix Arizona | Nov 1 – Mar 1 | Nov 24 – Apr 6 |
| Miami Florida | Nov 2 – Mar 14 | Nov 23 – Apr 17 |
| Hobart Tasmania | Jul 24 – Apr 26 | Sep 23 – Jun 21 |
| Canberra Australian Capital Territory | Feb 5 – Apr 9, Aug 21 – Dec 4 | Oct 10 – Jan 7, Feb 26 – May 17 |
| Sydney New South Wales | Jan 1 – Dec 31 | Jan 1 – Dec 31 |
| Melbourne Victoria | Jan 1 – Dec 31 | Jan 1 – Dec 31 |
| Auckland New Zealand | Jan 1 – Dec 31 | Jan 1 – Dec 31 |
| Adelaide South Australia | Feb 16 – Nov 30 | Mar 9 – Jan 3 |
| Perth Western Australia | Mar 18 – Nov 6 | Apr 8 – Dec 10 |
| Brisbane Queensland | Apr 1 – Sep 24 | Apr 22 – Oct 28 |
| Honolulu Hawaii | Too hot year-round: it bolts or fails to set before it matures. Try heat-tolerant varieties in the coolest months. | |
Other crops
TomatoesPeppersEggplantCucumbersZucchiniPumpkinsWatermelonsSweet cornGreen beansPeasLettuceSpinachKaleCabbageBroccoliCarrotsBeetsOnionsGarlicPotatoesSwiss chardBasilCilantroParsley