Frost Dates for Mccomb, MS 39648
Last spring frost March 21 · First fall frost November 16 · 240 frost-free days · USDA Zone 8b
ZIP 39648 has about 20,500 people.
Very long season: 240 frost-free days. Spring frost risk spans March 1–April 8 (38 days). Fall frost risk spans October 29–December 3 (35 days).
Frost probability for 39648
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 8 | March 21 | March 1 |
| Fall (first frost) | October 29 | November 16 | December 3 |
Dates come from NOAA 1971–2000 freeze probabilities at TYLERTOWN 5ESE (33.4 km away); the 50% date is the median year.
Which crops fit a 240-day season in Mccomb
In Mccomb (240 frost-free days, a very 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 | Feb 14 | Apr 4–Apr 11 | 198 | fits: 80 days to maturity, 198 available after Apr 4. | Jul 17 |
| Pepper | Feb 7 | Apr 4–Apr 11 | 198 | fits: 75 days to maturity, 198 available after Apr 4. | Jul 22 |
| Lettuce | Jan 24 | Feb 21–Feb 28 | 275 | two-plantings: Plant Feb 21 and again by Sep 25; both mature before Nov 23. | Sep 25 |
| Carrots | — | Feb 28–Mar 7 | 282 | fits: 70 days to maturity, 282 available after Feb 28. | Sep 14 |
| Cucumber | Feb 28 | Apr 4–Apr 11 | 212 | two-plantings: Plant Apr 4 and again by Aug 20; both mature before Nov 2. | Aug 20 |
| Beans | — | Mar 28–Apr 11 | 226 | two-plantings: Plant Mar 28 and again by Aug 27; both mature before Nov 9. | Aug 27 |
| Peas | — | Jan 24–Apr 4 | 303 | fits: 65 days to maturity, 303 available after Jan 24. | Sep 5 |
| Zucchini | Mar 7 | Apr 4–Apr 11 | 212 | two-plantings: Plant Apr 4 and again by Aug 25; both mature before Nov 2. | Aug 25 |
| Onion | Dec 27 | Feb 21–Mar 7 | 275 | fits: 100 days to maturity, 275 available after Feb 21. | — |
| Spinach | — | Jan 24–Mar 14 | 317 | two-plantings: Plant Jan 24 and again by Oct 14; both mature before Dec 7. | Oct 14 |
| Kale | Jan 10 | Feb 21–Mar 7 | 289 | two-plantings: Plant Feb 21 and again by Sep 29; both mature before Dec 7. | Sep 29 |
| Broccoli | Jan 24 | Feb 21–Mar 7 | 275 | fits: 80 days to maturity, 275 available after Feb 21. | Aug 21 |
| Cabbage | Jan 24 | Feb 21–Mar 7 | 289 | fits: 70 days to maturity, 289 available after Feb 21. | Sep 14 |
| Radish | — | Jan 24–Apr 18 | 303 | two-plantings: Plant Jan 24 and again by Oct 15; both mature before Nov 23. | Oct 15 |
| Beets | — | Jan 24–Apr 18 | 303 | two-plantings: Plant Jan 24 and again by Sep 15; both mature before Nov 23. | Sep 15 |
| Potatoes | — | Mar 7–Mar 14 | 261 | fits: 90 days to maturity, 261 available after Mar 7. | — |
| Garlic | — | Nov 16 | 345 | overwinter: Plant Nov 16 to Dec 7; harvest the following summer. | Dec 7 |
| Strawberry | — | Feb 14–Apr 11 | 296 | perennial: A perennial: plant Feb 14; it fruits from the following year and keeps producing for several years. | — |
| Corn | Feb 21 | Mar 28–Apr 4 | 212 | fits: 75 days to maturity, 212 available after Mar 28. | Jul 29 |
| Pumpkin | Mar 7 | Apr 4–Apr 4 | 205 | fits: 100 days to maturity, 205 available after Apr 4. | Jul 4 |
| Cauliflower | Feb 7 | Mar 14–Mar 28 | 254 | fits: 75 days to maturity, 254 available after Mar 14. | Aug 26 |
| Swiss Chard | Jan 24 | Mar 7–Mar 7 | 261 | two-plantings: Plant Mar 7 and again by Sep 15; both mature before Nov 23. | Sep 15 |
| Arugula | — | Jan 24–Apr 18 | 317 | two-plantings: Plant Jan 24 and again by Oct 14; both mature before Dec 7. | Oct 14 |
| Brussel Sprouts | Jan 24 | Feb 21–Mar 7 | 289 | fits: 100 days to maturity, 289 available after Feb 21. | Aug 15 |
| Butternut Squash | Mar 7 | Apr 4–Apr 11 | 205 | fits: 100 days to maturity, 205 available after Apr 4. | Jul 4 |
| Eggplant | Jan 31 | Apr 4–Apr 11 | 198 | fits: 70 days to maturity, 198 available after Apr 4. | Jul 27 |
| Okra | Feb 21 | Mar 28–Apr 4 | 219 | two-plantings: Plant Mar 28 and again by Aug 25; both mature before Nov 2. | Aug 25 |
| Basil | Feb 14 | Apr 11–Apr 11 | 205 | two-plantings: Plant Apr 11 and again by Aug 20; both mature before Nov 2. | Aug 20 |
| Cilantro | — | Feb 21–Mar 14 | 275 | two-plantings: Plant Feb 21 and again by Sep 20; both mature before Nov 23. | Sep 20 |
| Parsley | Jan 10 | Mar 28–Apr 4 | 240 | fits: 70 days to maturity, 240 available after Mar 28. | Aug 31 |
| Celery | Jan 10 | Mar 28–Apr 11 | 240 | fits: 120 days to maturity, 240 available after Mar 28. | Jul 12 |
| Scallions | Jan 10 | Feb 21–Mar 7 | 289 | two-plantings: Plant Feb 21 and again by Sep 24; both mature before Dec 7. | Sep 24 |
| Turnip | — | Feb 21–Mar 7 | 289 | two-plantings: Plant Feb 21 and again by Oct 4; both mature before Dec 7. | Oct 4 |
| Kohlrabi | — | Feb 7–Feb 21 | 303 | two-plantings: Plant Feb 7 and again by Sep 29; both mature before Dec 7. | Sep 29 |
| Bok Choy | Feb 21 | Mar 14–Mar 21 | 254 | two-plantings: Plant Mar 14 and again by Sep 25; both mature before Nov 23. | Sep 25 |
| Collards | Jan 10 | Feb 21–Mar 7 | 289 | two-plantings: Plant Feb 21 and again by Sep 24; both mature before Dec 7. | Sep 24 |
| Cantaloupe | Mar 7 | Apr 4–Apr 11 | 198 | fits: 85 days to maturity, 198 available after Apr 4. | Jul 12 |
| Chives | Dec 27 | Mar 28–Apr 4 | 254 | fits: 90 days to maturity, 254 available after Mar 28. | — |
| Dill | — | Jan 24–Apr 18 | 303 | two-plantings: Plant Jan 24 and again by Sep 15; both mature before Nov 23. | Sep 15 |
| Oregano | Jan 10 | Mar 28–Apr 4 | 254 | fits: 80 days to maturity, 254 available after Mar 28. | — |
| Rosemary | Dec 27 | Mar 28–Apr 4 | 240 | fits: 80 days to maturity, 240 available after Mar 28. | — |
| Sage | Jan 24 | Mar 28–Apr 4 | 254 | fits: 75 days to maturity, 254 available after Mar 28. | — |
| Thyme | Jan 10 | Mar 28–Apr 4 | 254 | fits: 90 days to maturity, 254 available after Mar 28. | — |
| Calendula | Feb 7 | Mar 7–Mar 21 | 261 | two-plantings: Plant Mar 7 and again by Sep 20; both mature before Nov 23. | Sep 20 |
| Cosmos | Feb 21 | Mar 21–Apr 4 | 226 | two-plantings: Plant Mar 21 and again by Aug 20; both mature before Nov 2. | Aug 20 |
| Lavender | Dec 27 | Mar 21–Apr 4 | 261 | fits: 90 days to maturity, 261 available after Mar 21. | — |
| Marigolds | Feb 7 | Mar 21–Mar 28 | 226 | two-plantings: Plant Mar 21 and again by Aug 30; both mature before Nov 2. | Aug 30 |
| Melons | Mar 7 | Apr 4–Apr 11 | 198 | fits: 85 days to maturity, 198 available after Apr 4. | Jul 12 |
| Mint | — | Mar 21–Apr 4 | 261 | fits: 90 days to maturity, 261 available after Mar 21. | — |
| Nasturtiums | Feb 21 | Mar 21–Mar 28 | 226 | two-plantings: Plant Mar 21 and again by Aug 25; both mature before Nov 2. | Aug 25 |
| Pole Beans | — | Mar 28–Apr 11 | 219 | fits: 65 days to maturity, 219 available after Mar 28. | Aug 15 |
| Spaghetti Squash | Mar 7 | Apr 4–Apr 11 | 205 | fits: 90 days to maturity, 205 available after Apr 4. | Jul 14 |
| Sunflowers | — | Mar 21–Apr 4 | 226 | fits: 70 days to maturity, 226 available after Mar 21. | Aug 10 |
| Tomatillos | Jan 24 | Mar 28–Apr 4 | 205 | fits: 75 days to maturity, 205 available after Mar 28. | Jul 22 |
| Watermelon | Mar 7 | Mar 28–Apr 4 | 205 | fits: 80 days to maturity, 205 available after Mar 28. | Jul 17 |
| Yellow Squash | Mar 7 | Apr 4–Apr 11 | 212 | two-plantings: Plant Apr 4 and again by Aug 25; both mature before Nov 2. | Aug 25 |
| Zinnias | Feb 21 | Mar 21–Apr 4 | 226 | two-plantings: Plant Mar 21 and again by Aug 20; both mature before Nov 2. | Aug 20 |
Month by month in Mccomb
| Month | What to do |
|---|---|
| January | Start indoors: Celery (Jan 10), Collards (Jan 10), Kale (Jan 10), Oregano (Jan 10), Parsley (Jan 10), Scallions (Jan 10), +9 more. Direct sow from: Arugula (Jan 24), Beets (Jan 24), Dill (Jan 24), Peas (Jan 24), Radish (Jan 24), Spinach (Jan 24). |
| February | Start indoors: Calendula (Feb 7), Cauliflower (Feb 7), Marigolds (Feb 7), Pepper (Feb 7), Basil (Feb 14), Tomato (Feb 14), +7 more. Direct sow from: Kohlrabi (Feb 7), Cilantro (Feb 21), Turnip (Feb 21), Carrots (Feb 28). Transplant from: Broccoli (Feb 21), Brussel Sprouts (Feb 21), Cabbage (Feb 21), Collards (Feb 21), Kale (Feb 21), Lettuce (Feb 21), +2 more. Plant: Strawberry (Feb 14). |
| March | Start indoors: Butternut Squash (Mar 7), Cantaloupe (Mar 7), Melons (Mar 7), Pumpkin (Mar 7), Spaghetti Squash (Mar 7), Watermelon (Mar 7), +2 more. Direct sow from: Potatoes (Mar 7), Sunflowers (Mar 21), Beans (Mar 28), Pole Beans (Mar 28). Transplant from: Calendula (Mar 7), Swiss Chard (Mar 7), Bok Choy (Mar 14), Cauliflower (Mar 14), Cosmos (Mar 21), Lavender (Mar 21), +15 more. Last frost around March 21. |
| April | Transplant from: Butternut Squash (Apr 4), Cantaloupe (Apr 4), Cucumber (Apr 4), Eggplant (Apr 4), Melons (Apr 4), Pepper (Apr 4), +6 more. |
| May | Succession plant lettuce and greens. Keep beds weeded and watered consistently. |
| June | Harvest regularly to encourage production. Monitor for pests and disease. |
| July | Last sowing dates: Butternut Squash (Jul 4), Pumpkin (Jul 4), Cantaloupe (Jul 12), Celery (Jul 12), Melons (Jul 12), Spaghetti Squash (Jul 14), +6 more. |
| August | Last sowing dates: Sunflowers (Aug 10), Brussel Sprouts (Aug 15), Pole Beans (Aug 15), Basil (Aug 20), Cosmos (Aug 20), Cucumber (Aug 20), +10 more. |
| September | Last sowing dates: Peas (Sep 5), Cabbage (Sep 14), Carrots (Sep 14), Beets (Sep 15), Dill (Sep 15), Swiss Chard (Sep 15), +8 more. |
| October | Last sowing dates: Turnip (Oct 4), Arugula (Oct 14), Spinach (Oct 14), Radish (Oct 15). |
| November | Direct sow from: Garlic (Nov 16). First frost around November 16. |
| December | Start indoors: Chives (Dec 27), Lavender (Dec 27), Onion (Dec 27), Rosemary (Dec 27). Last sowing dates: Garlic (Dec 7). |
Frequently Asked Questions
What is the last frost date for Mccomb, MS (ZIP 39648)?
The median last spring frost date for Mccomb, MS (ZIP code 39648) is around March 21. 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 1; one in ten it runs past April 8.
What is the first fall frost date in Mccomb, MS?
The median first fall frost date for Mccomb, MS is around November 16. 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 29 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Mccomb, MS?
The frost-free growing season in Mccomb is about 240 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 Mccomb (240 frost-free days, a very long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Mccomb, MS?
Mccomb, MS is in USDA hardiness zone 8b (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 Mccomb, MS?
Start tomatoes indoors Feb 14 and plant out Apr 4 in Mccomb. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Mccomb?
Two: plant Feb 21 and again by Sep 25; both mature before Nov 23.
When do I plant garlic in Mccomb?
Nov 16 to Dec 7; it overwinters and is ready the following summer.
Can I get two tomato crops in Mccomb?
Yes: plant out Apr 4 for a summer crop, and set out a second round of transplants by Jul 17 for a fall crop.
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