Frost dates for 63032 — Florissant, MO
Last spring frostApr 4median date
First fall frostOct 29median date
Growing season208 daysfrost-free
Hardiness zone7aZone 7a
How Florissant compares
- In 8 years out of 10, the last spring frost in Florissant falls between March 20 and April 21, a 32-day window. The first fall frost falls between October 15 and November 11.
- The median last frost is 8 days earlier than the Missouri median of Apr 12.
- Its 208-day growing season is longer than 86% of the 938 Missouri places with a regular frost season (state median 195 days).
- The last frost is 12 days earlier than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 106 nights a year at or below 32°F.
- Compared with Saint Charles, MO, 18 km away, the last frost here is 5 days earlier than there and the growing season is 8 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 20 |
| 50% (median) | April 4 |
| 10% (safe for tender plants) | April 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 15 |
| 50% (median) | October 29 |
| 90% (late) | November 11 |
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 Florissant, MO
Frost dates for 63032 — Florissant, MO — last frost Apr 4, first frost Oct 29, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 10 to Jan 24Transplant outside: Mar 7 to Mar 21
Start indoors: Jan 24 to Feb 7Transplant outside: Apr 18 to May 2
Start indoors: Jan 24 to Feb 7Transplant outside: Apr 18 to May 2
Start indoors: Feb 7 to Feb 21Transplant outside: Apr 11 to Apr 25
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 14 to Mar 28Sow outdoors: Mar 7 to Apr 11Plant for fall: Sep 3 to Oct 1
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 7 to Mar 21Sow outdoors: Mar 7 to Mar 21Plant for fall: Aug 20 to Sep 10
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 21 to Apr 4Plant for fall: Jul 23 to Aug 13
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 14 to Mar 28Plant for fall: Jul 23 to Aug 13
Start indoors: Feb 7 to Feb 21Transplant outside: Mar 21 to Apr 4Plant for fall: Jul 23 to Aug 13
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 25 to May 9Sow outdoors: Apr 25 to May 9
Start indoors: Feb 21 to Mar 7Transplant outside: Apr 11 to Apr 25
Sow outdoors: Feb 21 to Mar 14Plant for fall: Aug 6 to Aug 27
Sow outdoors: Feb 21 to Mar 14Plant for fall: Sep 3 to Sep 24
Sow outdoors: Feb 28 to Apr 11Plant for fall: Sep 17 to Oct 8
Start indoors: Mar 7 to Mar 14Transplant outside: Apr 18 to Apr 25Sow outdoors: Apr 11 to Apr 25Plant for fall: Aug 13 to Aug 27
Start indoors: Mar 7 to Mar 14Sow outdoors: Apr 11 to Apr 25Plant for fall: Aug 20 to Sep 3
Start indoors: Mar 7 to Mar 14Sow outdoors: Apr 11 to Apr 25
Start indoors: Mar 7 to Mar 14Transplant outside: Apr 18 to May 2
Sow outdoors: Mar 14 to Apr 11Plant for fall: Aug 6 to Aug 20
Sow outdoors: Mar 14 to Apr 11Plant for fall: Aug 20 to Sep 3
Sow outdoors: Mar 14 to Apr 4
Sow outdoors: Mar 21 to Apr 18Plant for fall: Aug 20 to Sep 3
Sow outdoors: Mar 21 to Apr 11Plant for fall: Sep 3 to Sep 24
Sow outdoors: Apr 11 to May 2Plant for fall: Aug 13 to Aug 27
Sow outdoors: Apr 11 to Apr 25
Transplant outside: Apr 18 to May 9
Plant for fall: Oct 15 to Nov 19
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Florissant, MO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 10 – Jan 24 | Mar 7 – Mar 21 | — | — |
| Peppers | Jan 24 – Feb 7 | Apr 18 – May 2 | — | — |
| Eggplant | Jan 24 – Feb 7 | Apr 18 – May 2 | — | — |
| Tomatoes | Feb 7 – Feb 21 | Apr 11 – Apr 25 | — | — |
| Lettuce | Feb 7 – Feb 21 | Mar 14 – Mar 28 | Mar 7 – Apr 11 | Sep 3 – Oct 1 |
| Kale | Feb 7 – Feb 21 | Mar 7 – Mar 21 | Mar 7 – Mar 21 | Aug 20 – Sep 10 |
| Broccoli | Feb 7 – Feb 21 | Mar 21 – Apr 4 | — | Jul 23 – Aug 13 |
| Cabbage | Feb 7 – Feb 21 | Mar 14 – Mar 28 | — | Jul 23 – Aug 13 |
| Cauliflower | Feb 7 – Feb 21 | Mar 21 – Apr 4 | — | Jul 23 – Aug 13 |
| Okra | Feb 21 – Mar 7 | Apr 25 – May 9 | Apr 25 – May 9 | — |
| Basil | Feb 21 – Mar 7 | Apr 11 – Apr 25 | — | — |
| Peas | — | — | Feb 21 – Mar 14 | Aug 6 – Aug 27 |
| Spinach | — | — | Feb 21 – Mar 14 | Sep 3 – Sep 24 |
| Radishes | — | — | Feb 28 – Apr 11 | Sep 17 – Oct 8 |
| Cucumbers | Mar 7 – Mar 14 | Apr 18 – Apr 25 | Apr 11 – Apr 25 | Aug 13 – Aug 27 |
| Zucchini & Summer Squash | Mar 7 – Mar 14 | — | Apr 11 – Apr 25 | Aug 20 – Sep 3 |
| Winter Squash & Pumpkins | Mar 7 – Mar 14 | — | Apr 11 – Apr 25 | — |
| Melons & Watermelon | Mar 7 – Mar 14 | Apr 18 – May 2 | — | — |
| Carrots | — | — | Mar 14 – Apr 11 | Aug 6 – Aug 20 |
| Beets | — | — | Mar 14 – Apr 11 | Aug 20 – Sep 3 |
| Potatoes | — | — | Mar 14 – Apr 4 | — |
| Swiss Chard | — | — | Mar 21 – Apr 18 | Aug 20 – Sep 3 |
| Cilantro | — | — | Mar 21 – Apr 11 | Sep 3 – Sep 24 |
| Green Beans | — | — | Apr 11 – May 2 | Aug 13 – Aug 27 |
| Sweet Corn | — | — | Apr 11 – Apr 25 | — |
| Sweet Potatoes | — | Apr 18 – May 9 | — | — |
| Garlic | — | — | — | Oct 15 – Nov 19 |
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 St Charles 7 Ssw, MO weather station, 10 km away (elevation 449 ft (137 m)).
ZIP codes in Florissant: 63031 63032 63033 63034
Frost dates near Florissant
- Fenton Apr 4 · Oct 29
- Maryland Heights Apr 2 · Nov 4
- Saint Ann Apr 2 · Nov 4
- Valley Park Apr 4 · Oct 29
- Ballwin Apr 4 · Oct 29
- Saint Louis Apr 1 · Nov 4
- Bridgeton Apr 2 · Nov 4
- Chesterfield Apr 4 · Oct 29
Frequently asked questions
When is the last frost in Florissant, MO?
The median last spring frost in Florissant, MO is April 4. There is still about a 10% chance of frost after April 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Florissant, MO?
The median first fall frost is October 29, with about a 10% chance of frost before October 15.
How long is the growing season in Florissant, MO?
About 208 days between the median last spring frost and first fall frost.
What planting zone is Florissant, MO?
Florissant, MO is in USDA hardiness zone 7a.