When to plant Swiss chard in St. Clair County, Missouri, United States
Swiss chard can be planted after April 20, when air temperature is consistently in a range between 20°F and 80°F and soil temperature is above 45°F. For the best results, Swiss chard should be planted after May 06, when air temperature is consistently in a range between 50°F and 75°F and soil temperature is above 50°F.
Growing Swiss chard in St. Clair County
Days suitable for growing Swiss chard in St. Clair County, Missouri
Swiss chard needs on average between 50 and 60 days to mature and produce harvest.
St. Clair County has 2 distinct seasons suitable for growing Swiss chard
April 20 to June 14
This Swiss chard growing season in St. Clair County is quite short, with only 56 days suitable for growth so it is really important to time your planting activities, and choose varieties with shorter time to harvest requirements.
August 30 to October 28
Swiss chard needs on average between 50 and 60 days to mature and produce harvest. With 60 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 St. Clair County before April 20 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 St. Clair 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.
St. Clair County has 2 distinct seasons for growing Swiss chard
In order to get plants ready for April 20 seeds should be started indoors bwetween March 09 and April 15
Seeds started after April 15 are not likely to mature and produce harvest.
This Swiss chard growing season in St. Clair County is quite short, with only 56 days suitable for growth so it is really important to time your planting activities, and choose varieties with shorter time to harvest requirements.
In order to get plants ready for August 30 seeds should be started indoors bwetween July 19 and August 29
Seeds started after August 29 are not likely to mature and produce harvest.
This Swiss chard growing season in St. Clair County is quite short, with only 60 days suitable for growth so it is really important to time your planting activities, and choose varieties with shorter time to harvest requirements.
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 | 188 |
| Last frost expected date | April 14 |
| First frost expected date | October 19 |
| Dates with ideal conditions | April 29 to April 30 (2 days) May 02 to May 04 (3 days) May 06 to June 02 (28 days) August 31 September 12 September 22 to September 26 (5 days) September 28 to October 13 (16 days) October 15 October 23 to October 24 (2 days) November 10 |
| Dates with suitable conditions | March 23 March 28 to March 30 (3 days) April 03 to April 13 (11 days) April 15 to April 18 (4 days) April 20 to June 14 (56 days) June 18 to June 19 (2 days) June 22 to June 24 (3 days) June 26 to June 27 (2 days) July 01 to July 02 (2 days) July 08 July 22 July 30 to August 06 (8 days) August 08 to August 09 (2 days) August 14 to August 18 (5 days) August 22 August 27 to August 28 (2 days) August 30 to October 28 (60 days) November 04 to November 11 (8 days) November 21 |
| Total days ideal for growing Swiss chard in St. Clair County | 60 |
| Total days suitable for growing Swiss chard in St. Clair County | 173 |
| 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 St. Clair County, Missouri
Table with days suitable to grow vegetables in St. Clair County, Missouri
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 | 30°F to 44°F | 16°F to 59°F | TRUE |
| 2 | January 04 - January 10 | 32°F to 45°F | 15°F to 59°F | TRUE |
| 3 | January 11 - January 17 | 32°F to 44°F | 24°F to 57°F | TRUE |
| 4 | January 18 - January 24 | 28°F to 40°F | 13°F to 52°F | TRUE |
| 5 | January 25 - January 31 | 27°F to 40°F | 6°F to 55°F | TRUE |
| 6 | February 01 - February 07 | 29°F to 44°F | 9°F to 62°F | TRUE |
| 7 | February 08 - February 14 | 26°F to 40°F | 6°F to 57°F | TRUE |
| 8 | February 15 - February 21 | 25°F to 43°F | -10°F to 65°F | TRUE |
| 9 | February 22 - February 28 | 31°F to 48°F | 17°F to 65°F | TRUE |
| 10 | March 01 - March 07 | 34°F to 53°F | 8°F to 67°F | TRUE |
| 11 | March 08 - March 14 | 37°F to 52°F | 13°F to 66°F | TRUE |
| 12 | March 15 - March 21 | 38°F to 54°F | 24°F to 69°F | TRUE |
| 13 | March 22 - March 28 | 41°F to 56°F | 31°F to 74°F | TRUE |
| 14 | March 29 - April 04 | 42°F to 61°F | 30°F to 73°F | TRUE |
| 15 | April 05 - April 11 | 46°F to 64°F | 33°F to 78°F | TRUE |
| 16 | April 12 - April 18 | 43°F to 60°F | 32°F to 74°F | TRUE |
| 17 | April 19 - April 25 | 46°F to 62°F | 32°F to 75°F | TRUE |
| 18 | April 26 - May 02 | 50°F to 65°F | 40°F to 75°F | TRUE |
| 19 | May 03 - May 09 | 52°F to 67°F | 43°F to 82°F | TRUE |
| 20 | May 10 - May 16 | 53°F to 67°F | 41°F to 83°F | TRUE |
| 21 | May 17 - May 23 | 56°F to 69°F | 47°F to 78°F | TRUE |
| 22 | May 24 - May 30 | 58°F to 72°F | 46°F to 80°F | TRUE |
| 23 | May 31 - June 06 | 60°F to 75°F | 52°F to 83°F | TRUE |
| 24 | June 07 - June 13 | 62°F to 77°F | 52°F to 88°F | TRUE |
| 25 | June 14 - June 20 | 64°F to 81°F | 57°F to 89°F | TRUE |
| 26 | June 21 - June 27 | 64°F to 80°F | 56°F to 88°F | TRUE |
| 27 | June 28 - July 04 | 66°F to 81°F | 61°F to 92°F | |
| 28 | July 05 - July 11 | 66°F to 81°F | 59°F to 89°F | |
| 29 | July 12 - July 18 | 67°F to 82°F | 61°F to 90°F | |
| 30 | July 19 - July 25 | 67°F to 83°F | 59°F to 91°F | |
| 31 | July 26 - August 01 | 67°F to 81°F | 63°F to 91°F | |
| 32 | August 02 - August 08 | 66°F to 80°F | 56°F to 88°F | TRUE |
| 33 | August 09 - August 15 | 67°F to 81°F | 59°F to 87°F | |
| 34 | August 16 - August 22 | 65°F to 80°F | 56°F to 94°F | TRUE |
| 35 | August 23 - August 29 | 66°F to 81°F | 59°F to 91°F | |
| 36 | August 30 - September 05 | 64°F to 78°F | 58°F to 87°F | TRUE |
| 37 | September 06 - September 12 | 62°F to 78°F | 53°F to 85°F | TRUE |
| 38 | September 13 - September 19 | 61°F to 78°F | 55°F to 87°F | TRUE |
| 39 | September 20 - September 26 | 59°F to 74°F | 50°F to 86°F | TRUE |
| 40 | September 27 - October 03 | 58°F to 74°F | 44°F to 81°F | TRUE |
| 41 | October 04 - October 10 | 53°F to 69°F | 44°F to 80°F | TRUE |
| 42 | October 11 - October 17 | 50°F to 65°F | 37°F to 78°F | TRUE |
| 43 | October 18 - October 24 | 49°F to 64°F | 32°F to 77°F | TRUE |
| 44 | October 25 - October 31 | 42°F to 52°F | 29°F to 71°F | TRUE |
| 45 | November 01 - November 07 | 43°F to 58°F | 28°F to 71°F | TRUE |
| 46 | November 08 - November 14 | 41°F to 55°F | 17°F to 71°F | TRUE |
| 47 | November 15 - November 21 | 39°F to 53°F | 24°F to 67°F | TRUE |
| 48 | November 22 - November 28 | 36°F to 50°F | 28°F to 60°F | TRUE |
| 49 | November 29 - December 05 | 37°F to 50°F | 27°F to 64°F | TRUE |
| 50 | December 06 - December 12 | 36°F to 50°F | 27°F to 63°F | TRUE |
| 51 | December 13 - December 19 | 33°F to 45°F | 18°F to 67°F | TRUE |
| 52 | December 20 - December 26 | 33°F to 47°F | 3°F to 65°F | TRUE |
| 53 | December 27 - December 31 | 35°F to 49°F | 17°F to 62°F | TRUE |
Days with suitable temperature for growing Swiss chard in St. Clair County, Missouri
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
