When to plant Swiss chard in Polk County, Wisconsin, United States
Swiss chard can be planted after May 12, when air temperature is consistently in a range between 20°F and 80°F and soil temperature is above 45°F.
Growing Swiss chard in Polk County
Days suitable for growing Swiss chard in Polk County, Wisconsin
Swiss chard needs on average between 50 and 60 days to mature and produce harvest.
Polk County has 2 distinct seasons suitable for growing Swiss chard
May 12 to July 18
Swiss chard needs on average between 50 and 60 days to mature and produce harvest. With 68 suitable for growht, you can expect good harvest without too much effort if all planting activities are done in timely manner.
July 20 to October 14
Swiss chard needs on average between 50 and 60 days to mature and produce harvest. With 87 suitable for growht, you can expect good harvest without too much effort if all planting activities are done in timely manner.
Planting Swiss chard in Polk County before May 12 without any additional protection is not advised because cold streaks can damage or kill off young plant.
Growing season extention
In order to maximize chances for a good harvest of Swiss chard in Polk County, 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 Swiss chard to sprout, and grow big enough to be ready for transplanting.
Polk County has 2 distinct seasons for growing Swiss chard
In order to get plants ready for May 12 seeds should be started indoors bwetween March 31 and May 19
Seeds started after May 19 are not likely to mature and produce harvest.
Swiss chard needs on average between 50 and 60 days to mature and produce harvest. With 68 suitable for growth, you can expect good harvest without too much effort if all planting activities are done in timely manner.
In order to get plants ready for July 20 seeds should be started indoors bwetween June 08 and August 15
Seeds started after August 15 are not likely to mature and produce harvest.
Swiss chard needs on average between 50 and 60 days to mature and produce harvest. With 87 suitable for growth, you can expect good harvest without too much effort if all planting activities are done in timely manner.
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 80°F, which is in top of tolerable range for Swiss chard, consider using additional shading to prevent heat shock.
| Total frost free days | 155 |
| Last frost expected date | May 13 |
| First frost expected date | October 15 |
| Dates with ideal conditions | May 22 to May 25 (4 days) May 27 to June 02 (7 days) June 07 June 11 to June 13 (3 days) June 15 to June 16 (2 days) June 18 June 21 to June 22 (2 days) June 24 to June 26 (3 days) July 07 to July 08 (2 days) July 29 to July 30 (2 days) August 07 to August 08 (2 days) August 12 to August 16 (5 days) August 18 August 21 August 25 to September 11 (18 days) September 13 to October 03 (21 days) |
| Dates with suitable conditions | May 12 to July 18 (68 days) July 20 to October 14 (87 days) |
| Total days ideal for growing Swiss chard in Polk County | 75 |
| Total days suitable for growing Swiss chard in Polk County | 155 |
| Days needed for Swiss chard to mature and produce harvest | 50 - 60 |
| Seed can be planted directly into soil | yes |
Notable temperature facts for growing Swiss chard in Polk County, Wisconsin
Table with days suitable to grow vegetables in Polk County, Wisconsin
Tolerable temperature range for Swiss chard: 20°F to 80°F
| Week | Average temperature | Possible min and max temperature | Suitable for Swiss chard | |
|---|---|---|---|---|
| 1 | January 01 - January 03 | 10°F to 26°F | -18°F to 37°F | |
| 2 | January 04 - January 10 | 13°F to 27°F | -19°F to 40°F | |
| 3 | January 11 - January 17 | 17°F to 28°F | -6°F to 37°F | |
| 4 | January 18 - January 24 | 9°F to 23°F | -14°F to 38°F | |
| 5 | January 25 - January 31 | 4°F to 19°F | -30°F to 33°F | |
| 6 | February 01 - February 07 | 9°F to 24°F | -18°F to 42°F | |
| 7 | February 08 - February 14 | 6°F to 22°F | -19°F to 41°F | |
| 8 | February 15 - February 21 | 6°F to 25°F | -23°F to 40°F | |
| 9 | February 22 - February 28 | 14°F to 28°F | -6°F to 42°F | |
| 10 | March 01 - March 07 | 17°F to 33°F | -9°F to 53°F | |
| 11 | March 08 - March 14 | 24°F to 39°F | -5°F to 60°F | TRUE |
| 12 | March 15 - March 21 | 26°F to 41°F | 9°F to 57°F | TRUE |
| 13 | March 22 - March 28 | 28°F to 43°F | 13°F to 62°F | TRUE |
| 14 | March 29 - April 04 | 29°F to 45°F | 8°F to 68°F | TRUE |
| 15 | April 05 - April 11 | 36°F to 52°F | 19°F to 74°F | TRUE |
| 16 | April 12 - April 18 | 31°F to 48°F | 15°F to 75°F | TRUE |
| 17 | April 19 - April 25 | 35°F to 51°F | 27°F to 67°F | TRUE |
| 18 | April 26 - May 02 | 38°F to 55°F | 27°F to 77°F | TRUE |
| 19 | May 03 - May 09 | 41°F to 59°F | 32°F to 73°F | TRUE |
| 20 | May 10 - May 16 | 46°F to 63°F | 30°F to 83°F | TRUE |
| 21 | May 17 - May 23 | 49°F to 65°F | 35°F to 77°F | TRUE |
| 22 | May 24 - May 30 | 52°F to 69°F | 38°F to 80°F | TRUE |
| 23 | May 31 - June 06 | 56°F to 74°F | 45°F to 88°F | TRUE |
| 24 | June 07 - June 13 | 58°F to 74°F | 45°F to 87°F | TRUE |
| 25 | June 14 - June 20 | 58°F to 75°F | 48°F to 87°F | TRUE |
| 26 | June 21 - June 27 | 60°F to 75°F | 49°F to 84°F | TRUE |
| 27 | June 28 - July 04 | 63°F to 79°F | 53°F to 87°F | TRUE |
| 28 | July 05 - July 11 | 62°F to 76°F | 52°F to 85°F | TRUE |
| 29 | July 12 - July 18 | 61°F to 77°F | 55°F to 86°F | TRUE |
| 30 | July 19 - July 25 | 62°F to 78°F | 55°F to 86°F | TRUE |
| 31 | July 26 - August 01 | 62°F to 76°F | 54°F to 85°F | TRUE |
| 32 | August 02 - August 08 | 61°F to 76°F | 53°F to 85°F | TRUE |
| 33 | August 09 - August 15 | 60°F to 74°F | 52°F to 80°F | TRUE |
| 34 | August 16 - August 22 | 60°F to 75°F | 53°F to 88°F | TRUE |
| 35 | August 23 - August 29 | 62°F to 75°F | 53°F to 87°F | TRUE |
| 36 | August 30 - September 05 | 58°F to 72°F | 50°F to 89°F | TRUE |
| 37 | September 06 - September 12 | 54°F to 67°F | 38°F to 80°F | TRUE |
| 38 | September 13 - September 19 | 55°F to 70°F | 40°F to 80°F | TRUE |
| 39 | September 20 - September 26 | 54°F to 68°F | 45°F to 78°F | TRUE |
| 40 | September 27 - October 03 | 53°F to 64°F | 40°F to 79°F | TRUE |
| 41 | October 04 - October 10 | 48°F to 60°F | 36°F to 74°F | TRUE |
| 42 | October 11 - October 17 | 42°F to 53°F | 29°F to 71°F | TRUE |
| 43 | October 18 - October 24 | 40°F to 51°F | 27°F to 69°F | TRUE |
| 44 | October 25 - October 31 | 33°F to 44°F | 11°F to 60°F | TRUE |
| 45 | November 01 - November 07 | 34°F to 47°F | 17°F to 67°F | TRUE |
| 46 | November 08 - November 14 | 31°F to 42°F | 9°F to 64°F | TRUE |
| 47 | November 15 - November 21 | 27°F to 38°F | 8°F to 61°F | TRUE |
| 48 | November 22 - November 28 | 25°F to 35°F | 10°F to 49°F | TRUE |
| 49 | November 29 - December 05 | 23°F to 34°F | 0°F to 44°F | TRUE |
| 50 | December 06 - December 12 | 19°F to 31°F | -10°F to 46°F | |
| 51 | December 13 - December 19 | 18°F to 30°F | -10°F to 54°F | |
| 52 | December 20 - December 26 | 17°F to 29°F | -12°F to 50°F | |
| 53 | December 27 - December 31 | 17°F to 29°F | -9°F to 40°F |
Days with suitable temperature for growing Swiss chard in Polk County, Wisconsin
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
