Frost Dates for Arnold, MO 63010
Last spring frost April 10 · First fall frost October 22 · 195 frost-free days · USDA Zone 7a
ZIP 63010 has about 34,500 people.
Long season: 195 frost-free days. Spring frost risk spans March 28–April 26 (29 days). Fall frost risk spans October 7–November 6 (30 days).
Frost probability for 63010
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 26 | April 10 | March 28 |
| Fall (first frost) | October 7 | October 22 | November 6 |
Dates come from NOAA 1971–2000 freeze probabilities at WATERLOO (21.3 km away); the 50% date is the median year.
Which crops fit a 195-day season in Arnold
In Arnold (195 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Mar 6 | Apr 24–May 1 | 153 | fits: 80 days to maturity, 153 available after Apr 24. | Jun 22 |
| Pepper | Feb 27 | Apr 24–May 1 | 153 | fits: 75 days to maturity, 153 available after Apr 24. | Jun 27 |
| Lettuce | Feb 13 | Mar 13–Mar 20 | 230 | two-plantings: Plant Mar 13 and again by Aug 31; both mature before Oct 29. | Aug 31 |
| Carrots | — | Mar 20–Mar 27 | 237 | fits: 70 days to maturity, 237 available after Mar 20. | Aug 20 |
| Cucumber | Mar 20 | Apr 24–May 1 | 167 | two-plantings: Plant Apr 24 and again by Jul 26; both mature before Oct 8. | Jul 26 |
| Beans | — | Apr 17–May 1 | 181 | two-plantings: Plant Apr 17 and again by Aug 2; both mature before Oct 15. | Aug 2 |
| Peas | — | Feb 13–Apr 24 | 258 | fits: 65 days to maturity, 258 available after Feb 13. | Aug 11 |
| Zucchini | Mar 27 | Apr 24–May 1 | 167 | two-plantings: Plant Apr 24 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Onion | Jan 16 | Mar 13–Mar 27 | 230 | fits: 100 days to maturity, 230 available after Mar 13. | — |
| Spinach | — | Feb 13–Apr 3 | 272 | two-plantings: Plant Feb 13 and again by Sep 19; both mature before Nov 12. | Sep 19 |
| Kale | Jan 30 | Mar 13–Mar 27 | 244 | two-plantings: Plant Mar 13 and again by Sep 4; both mature before Nov 12. | Sep 4 |
| Broccoli | Feb 13 | Mar 13–Mar 27 | 230 | fits: 80 days to maturity, 230 available after Mar 13. | Jul 27 |
| Cabbage | Feb 13 | Mar 13–Mar 27 | 244 | fits: 70 days to maturity, 244 available after Mar 13. | Aug 20 |
| Radish | — | Feb 13–May 8 | 258 | two-plantings: Plant Feb 13 and again by Sep 20; both mature before Oct 29. | Sep 20 |
| Beets | — | Feb 13–May 8 | 258 | two-plantings: Plant Feb 13 and again by Aug 21; both mature before Oct 29. | Aug 21 |
| Potatoes | — | Mar 27–Apr 3 | 216 | fits: 90 days to maturity, 216 available after Mar 27. | — |
| Garlic | — | Oct 22 | 300 | overwinter: Plant Oct 22 to Nov 12; harvest the following summer. | Nov 12 |
| Strawberry | — | Mar 6–May 1 | 251 | perennial: A perennial: plant Mar 6; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 13 | Apr 17–Apr 24 | 167 | fits: 75 days to maturity, 167 available after Apr 17. | Jul 4 |
| Pumpkin | Mar 27 | Apr 24–Apr 24 | 160 | fits: 100 days to maturity, 160 available after Apr 24. | Jun 9 |
| Cauliflower | Feb 27 | Apr 3–Apr 17 | 209 | fits: 75 days to maturity, 209 available after Apr 3. | Aug 1 |
| Swiss Chard | Feb 13 | Mar 27–Mar 27 | 216 | two-plantings: Plant Mar 27 and again by Aug 21; both mature before Oct 29. | Aug 21 |
| Arugula | — | Feb 13–May 8 | 272 | two-plantings: Plant Feb 13 and again by Sep 19; both mature before Nov 12. | Sep 19 |
| Brussel Sprouts | Feb 13 | Mar 13–Mar 27 | 244 | fits: 100 days to maturity, 244 available after Mar 13. | Jul 21 |
| Butternut Squash | Mar 27 | Apr 24–May 1 | 160 | fits: 100 days to maturity, 160 available after Apr 24. | Jun 9 |
| Eggplant | Feb 20 | Apr 24–May 1 | 153 | fits: 70 days to maturity, 153 available after Apr 24. | Jul 2 |
| Okra | Mar 13 | Apr 17–Apr 24 | 174 | two-plantings: Plant Apr 17 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Basil | Mar 6 | May 1–May 1 | 160 | two-plantings: Plant May 1 and again by Jul 26; both mature before Oct 8. | Jul 26 |
| Cilantro | — | Mar 13–Apr 3 | 230 | two-plantings: Plant Mar 13 and again by Aug 26; both mature before Oct 29. | Aug 26 |
| Parsley | Jan 30 | Apr 17–Apr 24 | 195 | fits: 70 days to maturity, 195 available after Apr 17. | Aug 6 |
| Celery | Jan 30 | Apr 17–May 1 | 195 | fits: 120 days to maturity, 195 available after Apr 17. | Jun 17 |
| Scallions | Jan 30 | Mar 13–Mar 27 | 244 | two-plantings: Plant Mar 13 and again by Aug 30; both mature before Nov 12. | Aug 30 |
| Turnip | — | Mar 13–Mar 27 | 244 | two-plantings: Plant Mar 13 and again by Sep 9; both mature before Nov 12. | Sep 9 |
| Kohlrabi | — | Feb 27–Mar 13 | 258 | two-plantings: Plant Feb 27 and again by Sep 4; both mature before Nov 12. | Sep 4 |
| Bok Choy | Mar 13 | Apr 3–Apr 10 | 209 | two-plantings: Plant Apr 3 and again by Aug 31; both mature before Oct 29. | Aug 31 |
| Collards | Jan 30 | Mar 13–Mar 27 | 244 | two-plantings: Plant Mar 13 and again by Aug 30; both mature before Nov 12. | Aug 30 |
| Cantaloupe | Mar 27 | Apr 24–May 1 | 153 | fits: 85 days to maturity, 153 available after Apr 24. | Jun 17 |
| Chives | Jan 16 | Apr 17–Apr 24 | 209 | fits: 90 days to maturity, 209 available after Apr 17. | — |
| Dill | — | Feb 13–May 8 | 258 | two-plantings: Plant Feb 13 and again by Aug 21; both mature before Oct 29. | Aug 21 |
| Oregano | Jan 30 | Apr 17–Apr 24 | 209 | fits: 80 days to maturity, 209 available after Apr 17. | — |
| Rosemary | Jan 16 | Apr 17–Apr 24 | 195 | fits: 80 days to maturity, 195 available after Apr 17. | — |
| Sage | Feb 13 | Apr 17–Apr 24 | 209 | fits: 75 days to maturity, 209 available after Apr 17. | — |
| Thyme | Jan 30 | Apr 17–Apr 24 | 209 | fits: 90 days to maturity, 209 available after Apr 17. | — |
| Calendula | Feb 27 | Mar 27–Apr 10 | 216 | two-plantings: Plant Mar 27 and again by Aug 26; both mature before Oct 29. | Aug 26 |
| Cosmos | Mar 13 | Apr 10–Apr 24 | 181 | two-plantings: Plant Apr 10 and again by Jul 26; both mature before Oct 8. | Jul 26 |
| Lavender | Jan 16 | Apr 10–Apr 24 | 216 | fits: 90 days to maturity, 216 available after Apr 10. | — |
| Marigolds | Feb 27 | Apr 10–Apr 17 | 181 | two-plantings: Plant Apr 10 and again by Aug 5; both mature before Oct 8. | Aug 5 |
| Melons | Mar 27 | Apr 24–May 1 | 153 | fits: 85 days to maturity, 153 available after Apr 24. | Jun 17 |
| Mint | — | Apr 10–Apr 24 | 216 | fits: 90 days to maturity, 216 available after Apr 10. | — |
| Nasturtiums | Mar 13 | Apr 10–Apr 17 | 181 | two-plantings: Plant Apr 10 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Pole Beans | — | Apr 17–May 1 | 174 | fits: 65 days to maturity, 174 available after Apr 17. | Jul 21 |
| Spaghetti Squash | Mar 27 | Apr 24–May 1 | 160 | fits: 90 days to maturity, 160 available after Apr 24. | Jun 19 |
| Sunflowers | — | Apr 10–Apr 24 | 181 | fits: 70 days to maturity, 181 available after Apr 10. | Jul 16 |
| Tomatillos | Feb 13 | Apr 17–Apr 24 | 160 | fits: 75 days to maturity, 160 available after Apr 17. | Jun 27 |
| Watermelon | Mar 27 | Apr 17–Apr 24 | 160 | fits: 80 days to maturity, 160 available after Apr 17. | Jun 22 |
| Yellow Squash | Mar 27 | Apr 24–May 1 | 167 | two-plantings: Plant Apr 24 and again by Jul 31; both mature before Oct 8. | Jul 31 |
| Zinnias | Mar 13 | Apr 10–Apr 24 | 181 | two-plantings: Plant Apr 10 and again by Jul 26; both mature before Oct 8. | Jul 26 |
Month by month in Arnold
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 16), Lavender (Jan 16), Onion (Jan 16), Rosemary (Jan 16), Celery (Jan 30), Collards (Jan 30), +5 more. |
| February | Start indoors: Broccoli (Feb 13), Brussel Sprouts (Feb 13), Cabbage (Feb 13), Lettuce (Feb 13), Sage (Feb 13), Swiss Chard (Feb 13), +6 more. Direct sow from: Arugula (Feb 13), Beets (Feb 13), Dill (Feb 13), Peas (Feb 13), Radish (Feb 13), Spinach (Feb 13), +1 more. |
| March | Start indoors: Basil (Mar 6), Tomato (Mar 6), Bok Choy (Mar 13), Corn (Mar 13), Cosmos (Mar 13), Nasturtiums (Mar 13), +11 more. Direct sow from: Cilantro (Mar 13), Turnip (Mar 13), Carrots (Mar 20), Potatoes (Mar 27). Transplant from: Broccoli (Mar 13), Brussel Sprouts (Mar 13), Cabbage (Mar 13), Collards (Mar 13), Kale (Mar 13), Lettuce (Mar 13), +4 more. Plant: Strawberry (Mar 6). |
| April | Direct sow from: Sunflowers (Apr 10), Beans (Apr 17), Pole Beans (Apr 17). Transplant from: Bok Choy (Apr 3), Cauliflower (Apr 3), Cosmos (Apr 10), Lavender (Apr 10), Marigolds (Apr 10), Mint (Apr 10), +24 more. Last frost around April 10. |
| May | Transplant from: Basil (May 1). |
| June | Last sowing dates: Butternut Squash (Jun 9), Pumpkin (Jun 9), Cantaloupe (Jun 17), Celery (Jun 17), Melons (Jun 17), Spaghetti Squash (Jun 19), +4 more. |
| July | Last sowing dates: Eggplant (Jul 2), Corn (Jul 4), Sunflowers (Jul 16), Brussel Sprouts (Jul 21), Pole Beans (Jul 21), Basil (Jul 26), +8 more. |
| August | Last sowing dates: Cauliflower (Aug 1), Beans (Aug 2), Marigolds (Aug 5), Parsley (Aug 6), Peas (Aug 11), Cabbage (Aug 20), +10 more. |
| September | Last sowing dates: Kale (Sep 4), Kohlrabi (Sep 4), Turnip (Sep 9), Arugula (Sep 19), Spinach (Sep 19), Radish (Sep 20). |
| October | Direct sow from: Garlic (Oct 22). First frost around October 22. |
| November | Last sowing dates: Garlic (Nov 12). |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Arnold, MO (ZIP 63010)?
The median last spring frost date for Arnold, MO (ZIP code 63010) is around April 10. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before March 28; one in ten it runs past April 26.
What is the first fall frost date in Arnold, MO?
The median first fall frost date for Arnold, MO is around October 22. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around October 7 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Arnold, MO?
The frost-free growing season in Arnold is about 195 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Arnold (195 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Arnold, MO?
Arnold, MO is in USDA hardiness zone 7a (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Arnold, MO?
Start tomatoes indoors Mar 6 and plant out Apr 24 in Arnold. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Arnold?
Two: plant Mar 13 and again by Aug 31; both mature before Oct 29.
When do I plant garlic in Arnold?
Oct 22 to Nov 12; it overwinters and is ready the following summer.
Can I get two tomato crops in Arnold?
Yes: plant out Apr 24 for a summer crop, and set out a second round of transplants by Jun 22 for a fall crop.
Which nearby ZIP has a longer season?
Fenton (ZIP 63026) has 205 frost-free days, 10 more than Arnold (ZIP 63010). See Fenton ZIP 63026 frost dates
Nearby and related
- Frost dates for Imperial, MO 63052 (3.6 mi)
- Frost dates for Saint Louis, MO 63129 (4.3 mi)
- Frost dates for Fenton, MO 63026 (6.2 mi)
- Frost dates for Barnhart, MO 63012 (7.2 mi)
- Frost dates for High Ridge, MO 63049 (8 mi)
- When to plant in MO
- When to plant Peppers in MO
- When to plant Cucumbers in MO
- When to plant Zucchini in MO
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- When to plant Basil in MO
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- Look up another ZIP