Agar, SD frost dates
Last spring frostMay 8median date
First fall frostOct 2median date
Growing season147 daysfrost-free
Hardiness zone4bZone 4b
How Agar compares
- In 8 years out of 10, the last spring frost in Agar falls between April 25 and May 22, a 27-day window. The first fall frost falls between September 19 and October 15.
- The median last frost is 2 days later than the South Dakota median of May 6.
- Its 147-day growing season is longer than 40% of the 363 South Dakota places with a regular frost season (state median 149 days).
- The last frost is typical for zone 4b, where the median is May 8.
- The weather station records an average of 172 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 25 |
| 50% (median) | May 8 |
| 10% (safe for tender plants) | May 22 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 19 |
| 50% (median) | October 2 |
| 90% (late) | October 15 |
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 Agar, SD
Agar, SD frost dates — last frost May 8, first frost Oct 2, zone 4b. whenisthelastfrost.com
Crop
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Start indoors: Feb 13 to Feb 27Transplant outside: Apr 10 to Apr 24
Start indoors: Feb 27 to Mar 13Transplant outside: May 22 to Jun 5
Start indoors: Feb 27 to Mar 13Transplant outside: May 22 to Jun 5
Start indoors: Mar 13 to Mar 27Transplant outside: May 15 to May 29
Start indoors: Mar 13 to Mar 27Transplant outside: Apr 17 to May 1Sow outdoors: Apr 10 to May 15Plant for fall: Aug 7 to Sep 4
Start indoors: Mar 13 to Mar 27Transplant outside: Apr 10 to Apr 24Sow outdoors: Apr 10 to Apr 24Plant for fall: Jul 24 to Aug 14
Start indoors: Mar 13 to Mar 27Transplant outside: Apr 24 to May 8Plant for fall: Jun 26 to Jul 17
Start indoors: Mar 13 to Mar 27Transplant outside: Apr 17 to May 1Plant for fall: Jun 26 to Jul 17
Start indoors: Mar 13 to Mar 27Transplant outside: Apr 24 to May 8Plant for fall: Jun 26 to Jul 17
Start indoors: Mar 27 to Apr 10Transplant outside: May 29 to Jun 12Sow outdoors: May 29 to Jun 12
Start indoors: Mar 27 to Apr 10Transplant outside: May 15 to May 29
Sow outdoors: Mar 27 to Apr 17Plant for fall: Jul 10 to Jul 31
Sow outdoors: Mar 27 to Apr 17Plant for fall: Aug 7 to Aug 28
Sow outdoors: Apr 3 to May 15Plant for fall: Aug 21 to Sep 11
Start indoors: Apr 10 to Apr 17Transplant outside: May 22 to May 29Sow outdoors: May 15 to May 29Plant for fall: Jul 17 to Jul 31
Start indoors: Apr 10 to Apr 17Sow outdoors: May 15 to May 29Plant for fall: Jul 24 to Aug 7
Start indoors: Apr 10 to Apr 17Sow outdoors: May 15 to May 29
Start indoors: Apr 10 to Apr 17Transplant outside: May 22 to Jun 5
Sow outdoors: Apr 17 to May 15Plant for fall: Jul 10 to Jul 24
Sow outdoors: Apr 17 to May 15Plant for fall: Jul 24 to Aug 7
Sow outdoors: Apr 17 to May 8
Sow outdoors: Apr 24 to May 22Plant for fall: Jul 24 to Aug 7
Sow outdoors: Apr 24 to May 15Plant for fall: Aug 7 to Aug 28
Sow outdoors: May 15 to Jun 5Plant for fall: Jul 17 to Jul 31
Sow outdoors: May 15 to May 29
Transplant outside: May 22 to Jun 12
Plant for fall: Sep 18 to Oct 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Agar, SD
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 13 – Feb 27 | Apr 10 – Apr 24 | — | — |
| Peppers | Feb 27 – Mar 13 | May 22 – Jun 5 | — | — |
| Eggplant | Feb 27 – Mar 13 | May 22 – Jun 5 | — | — |
| Tomatoes | Mar 13 – Mar 27 | May 15 – May 29 | — | — |
| Lettuce | Mar 13 – Mar 27 | Apr 17 – May 1 | Apr 10 – May 15 | Aug 7 – Sep 4 |
| Kale | Mar 13 – Mar 27 | Apr 10 – Apr 24 | Apr 10 – Apr 24 | Jul 24 – Aug 14 |
| Broccoli | Mar 13 – Mar 27 | Apr 24 – May 8 | — | Jun 26 – Jul 17 |
| Cabbage | Mar 13 – Mar 27 | Apr 17 – May 1 | — | Jun 26 – Jul 17 |
| Cauliflower | Mar 13 – Mar 27 | Apr 24 – May 8 | — | Jun 26 – Jul 17 |
| Okra | Mar 27 – Apr 10 | May 29 – Jun 12 | May 29 – Jun 12 | — |
| Basil | Mar 27 – Apr 10 | May 15 – May 29 | — | — |
| Peas | — | — | Mar 27 – Apr 17 | Jul 10 – Jul 31 |
| Spinach | — | — | Mar 27 – Apr 17 | Aug 7 – Aug 28 |
| Radishes | — | — | Apr 3 – May 15 | Aug 21 – Sep 11 |
| Cucumbers | Apr 10 – Apr 17 | May 22 – May 29 | May 15 – May 29 | Jul 17 – Jul 31 |
| Zucchini & Summer Squash | Apr 10 – Apr 17 | — | May 15 – May 29 | Jul 24 – Aug 7 |
| Winter Squash & Pumpkins | Apr 10 – Apr 17 | — | May 15 – May 29 | — |
| Melons & Watermelon | Apr 10 – Apr 17 | May 22 – Jun 5 | — | — |
| Carrots | — | — | Apr 17 – May 15 | Jul 10 – Jul 24 |
| Beets | — | — | Apr 17 – May 15 | Jul 24 – Aug 7 |
| Potatoes | — | — | Apr 17 – May 8 | — |
| Swiss Chard | — | — | Apr 24 – May 22 | Jul 24 – Aug 7 |
| Cilantro | — | — | Apr 24 – May 15 | Aug 7 – Aug 28 |
| Green Beans | — | — | May 15 – Jun 5 | Jul 17 – Jul 31 |
| Sweet Corn | — | — | May 15 – May 29 | — |
| Sweet Potatoes | — | May 22 – Jun 12 | — | — |
| Garlic | — | — | — | Sep 18 – Oct 23 |
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 Onida 4 Nw, SD weather station, 13 km away (elevation 1,850 ft (564 m)).
Frost dates near Agar
- Onida May 8 · Oct 2
- Gettysburg May 7 · Oct 2
- Lebanon May 7 · Oct 2
- Blunt May 17 · Sep 24
- Harrold May 17 · Sep 24
- Hoven May 7 · Oct 2
- Tolstoy May 7 · Oct 2
- Holabird May 12 · Oct 1
- Seneca May 14 · Sep 29
- Akaska May 8 · Oct 1
Frequently asked questions
When is the last frost in Agar, SD?
The median last spring frost in Agar, SD is May 8. There is still about a 10% chance of frost after May 22, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Agar, SD?
The median first fall frost is October 2, with about a 10% chance of frost before September 19.
How long is the growing season in Agar, SD?
About 147 days between the median last spring frost and first fall frost.
What planting zone is Agar, SD?
Agar, SD is in USDA hardiness zone 4b.