Frost Dates for Slidell, LA 70460
Slidell has 3 ZIP codes. The Slidell, LA frost page lists all of them with their dates.
Last spring frost March 9 · First fall frost November 21 · 257 frost-free days · USDA Zone 9a
ZIP 70460 has about 21,700 people, one of 3 ZIP codes in Slidell.
Very long season: 257 frost-free days. Spring frost risk spans February 17–March 28 (39 days). Fall frost risk spans October 30–December 13 (44 days).
Frost probability for 70460
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 28 | March 9 | February 17 |
| Fall (first frost) | October 30 | November 21 | December 13 |
Dates come from NOAA 1971–2000 freeze probabilities at PICAYUNE (29.1 km away); the 50% date is the median year.
Which crops fit a 257-day season in Slidell
In Slidell (257 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 2 | Mar 23–Mar 30 | 215 | fits: 80 days to maturity, 215 available after Mar 23. | Jul 22 |
| Pepper | Jan 26 | Mar 23–Mar 30 | 215 | fits: 75 days to maturity, 215 available after Mar 23. | Jul 27 |
| Lettuce | Jan 12 | Feb 9–Feb 16 | 292 | two-plantings: Plant Feb 9 and again by Sep 30; both mature before Nov 28. | Sep 30 |
| Carrots | — | Feb 16–Feb 23 | 299 | fits: 70 days to maturity, 299 available after Feb 16. | Sep 19 |
| Cucumber | Feb 16 | Mar 23–Mar 30 | 229 | two-plantings: Plant Mar 23 and again by Aug 25; both mature before Nov 7. | Aug 25 |
| Beans | — | Mar 16–Mar 30 | 243 | two-plantings: Plant Mar 16 and again by Sep 1; both mature before Nov 14. | Sep 1 |
| Peas | — | Jan 12–Mar 23 | 320 | fits: 65 days to maturity, 320 available after Jan 12. | Sep 10 |
| Zucchini | Feb 23 | Mar 23–Mar 30 | 229 | two-plantings: Plant Mar 23 and again by Aug 30; both mature before Nov 7. | Aug 30 |
| Onion | Dec 15 | Feb 9–Feb 23 | 292 | fits: 100 days to maturity, 292 available after Feb 9. | — |
| Spinach | — | Jan 12–Mar 2 | 334 | two-plantings: Plant Jan 12 and again by Oct 19; both mature before Dec 12. | Oct 19 |
| Kale | Dec 29 | Feb 9–Feb 23 | 306 | two-plantings: Plant Feb 9 and again by Oct 4; both mature before Dec 12. | Oct 4 |
| Broccoli | Jan 12 | Feb 9–Feb 23 | 292 | fits: 80 days to maturity, 292 available after Feb 9. | Aug 26 |
| Cabbage | Jan 12 | Feb 9–Feb 23 | 306 | fits: 70 days to maturity, 306 available after Feb 9. | Sep 19 |
| Radish | — | Jan 12–Apr 6 | 320 | two-plantings: Plant Jan 12 and again by Oct 20; both mature before Nov 28. | Oct 20 |
| Beets | — | Jan 12–Apr 6 | 320 | two-plantings: Plant Jan 12 and again by Sep 20; both mature before Nov 28. | Sep 20 |
| Potatoes | — | Feb 23–Mar 2 | 278 | fits: 90 days to maturity, 278 available after Feb 23. | — |
| Garlic | — | Nov 21 | 362 | overwinter: Plant Nov 21 to Dec 12; harvest the following summer. | Dec 12 |
| Strawberry | — | Feb 2–Mar 30 | 313 | perennial: A perennial: plant Feb 2; it fruits from the following year and keeps producing for several years. | — |
| Corn | Feb 9 | Mar 16–Mar 23 | 229 | fits: 75 days to maturity, 229 available after Mar 16. | Aug 3 |
| Pumpkin | Feb 23 | Mar 23–Mar 23 | 222 | fits: 100 days to maturity, 222 available after Mar 23. | Jul 9 |
| Cauliflower | Jan 26 | Mar 2–Mar 16 | 271 | fits: 75 days to maturity, 271 available after Mar 2. | Aug 31 |
| Swiss Chard | Jan 12 | Feb 23–Feb 23 | 278 | two-plantings: Plant Feb 23 and again by Sep 20; both mature before Nov 28. | Sep 20 |
| Arugula | — | Jan 12–Apr 6 | 334 | two-plantings: Plant Jan 12 and again by Oct 19; both mature before Dec 12. | Oct 19 |
| Brussel Sprouts | Jan 12 | Feb 9–Feb 23 | 306 | fits: 100 days to maturity, 306 available after Feb 9. | Aug 20 |
| Butternut Squash | Feb 23 | Mar 23–Mar 30 | 222 | fits: 100 days to maturity, 222 available after Mar 23. | Jul 9 |
| Eggplant | Jan 19 | Mar 23–Mar 30 | 215 | fits: 70 days to maturity, 215 available after Mar 23. | Aug 1 |
| Okra | Feb 9 | Mar 16–Mar 23 | 236 | two-plantings: Plant Mar 16 and again by Aug 30; both mature before Nov 7. | Aug 30 |
| Basil | Feb 2 | Mar 30–Mar 30 | 222 | two-plantings: Plant Mar 30 and again by Aug 25; both mature before Nov 7. | Aug 25 |
| Cilantro | — | Feb 9–Mar 2 | 292 | two-plantings: Plant Feb 9 and again by Sep 25; both mature before Nov 28. | Sep 25 |
| Parsley | Dec 29 | Mar 16–Mar 23 | 257 | fits: 70 days to maturity, 257 available after Mar 16. | Sep 5 |
| Celery | Dec 29 | Mar 16–Mar 30 | 257 | fits: 120 days to maturity, 257 available after Mar 16. | Jul 17 |
| Scallions | Dec 29 | Feb 9–Feb 23 | 306 | two-plantings: Plant Feb 9 and again by Sep 29; both mature before Dec 12. | Sep 29 |
| Turnip | — | Feb 9–Feb 23 | 306 | two-plantings: Plant Feb 9 and again by Oct 9; both mature before Dec 12. | Oct 9 |
| Kohlrabi | — | Jan 26–Feb 9 | 320 | two-plantings: Plant Jan 26 and again by Oct 4; both mature before Dec 12. | Oct 4 |
| Bok Choy | Feb 9 | Mar 2–Mar 9 | 271 | two-plantings: Plant Mar 2 and again by Sep 30; both mature before Nov 28. | Sep 30 |
| Collards | Dec 29 | Feb 9–Feb 23 | 306 | two-plantings: Plant Feb 9 and again by Sep 29; both mature before Dec 12. | Sep 29 |
| Cantaloupe | Feb 23 | Mar 23–Mar 30 | 215 | fits: 85 days to maturity, 215 available after Mar 23. | Jul 17 |
| Chives | Dec 15 | Mar 16–Mar 23 | 271 | fits: 90 days to maturity, 271 available after Mar 16. | — |
| Dill | — | Jan 12–Apr 6 | 320 | two-plantings: Plant Jan 12 and again by Sep 20; both mature before Nov 28. | Sep 20 |
| Oregano | Dec 29 | Mar 16–Mar 23 | 271 | fits: 80 days to maturity, 271 available after Mar 16. | — |
| Rosemary | Dec 15 | Mar 16–Mar 23 | 257 | fits: 80 days to maturity, 257 available after Mar 16. | — |
| Sage | Jan 12 | Mar 16–Mar 23 | 271 | fits: 75 days to maturity, 271 available after Mar 16. | — |
| Thyme | Dec 29 | Mar 16–Mar 23 | 271 | fits: 90 days to maturity, 271 available after Mar 16. | — |
| Calendula | Jan 26 | Feb 23–Mar 9 | 278 | two-plantings: Plant Feb 23 and again by Sep 25; both mature before Nov 28. | Sep 25 |
| Cosmos | Feb 9 | Mar 9–Mar 23 | 243 | two-plantings: Plant Mar 9 and again by Aug 25; both mature before Nov 7. | Aug 25 |
| Lavender | Dec 15 | Mar 9–Mar 23 | 278 | fits: 90 days to maturity, 278 available after Mar 9. | — |
| Marigolds | Jan 26 | Mar 9–Mar 16 | 243 | two-plantings: Plant Mar 9 and again by Sep 4; both mature before Nov 7. | Sep 4 |
| Melons | Feb 23 | Mar 23–Mar 30 | 215 | fits: 85 days to maturity, 215 available after Mar 23. | Jul 17 |
| Mint | — | Mar 9–Mar 23 | 278 | fits: 90 days to maturity, 278 available after Mar 9. | — |
| Nasturtiums | Feb 9 | Mar 9–Mar 16 | 243 | two-plantings: Plant Mar 9 and again by Aug 30; both mature before Nov 7. | Aug 30 |
| Pole Beans | — | Mar 16–Mar 30 | 236 | fits: 65 days to maturity, 236 available after Mar 16. | Aug 20 |
| Spaghetti Squash | Feb 23 | Mar 23–Mar 30 | 222 | fits: 90 days to maturity, 222 available after Mar 23. | Jul 19 |
| Sunflowers | — | Mar 9–Mar 23 | 243 | fits: 70 days to maturity, 243 available after Mar 9. | Aug 15 |
| Tomatillos | Jan 12 | Mar 16–Mar 23 | 222 | fits: 75 days to maturity, 222 available after Mar 16. | Jul 27 |
| Watermelon | Feb 23 | Mar 16–Mar 23 | 222 | fits: 80 days to maturity, 222 available after Mar 16. | Jul 22 |
| Yellow Squash | Feb 23 | Mar 23–Mar 30 | 229 | two-plantings: Plant Mar 23 and again by Aug 30; both mature before Nov 7. | Aug 30 |
| Zinnias | Feb 9 | Mar 9–Mar 23 | 243 | two-plantings: Plant Mar 9 and again by Aug 25; both mature before Nov 7. | Aug 25 |
Month by month in Slidell
| Month | What to do |
|---|---|
| January | Start indoors: Broccoli (Jan 12), Brussel Sprouts (Jan 12), Cabbage (Jan 12), Lettuce (Jan 12), Sage (Jan 12), Swiss Chard (Jan 12), +6 more. Direct sow from: Arugula (Jan 12), Beets (Jan 12), Dill (Jan 12), Peas (Jan 12), Radish (Jan 12), Spinach (Jan 12), +1 more. |
| February | Start indoors: Basil (Feb 2), Tomato (Feb 2), Bok Choy (Feb 9), Corn (Feb 9), Cosmos (Feb 9), Nasturtiums (Feb 9), +11 more. Direct sow from: Cilantro (Feb 9), Turnip (Feb 9), Carrots (Feb 16), Potatoes (Feb 23). Transplant from: Broccoli (Feb 9), Brussel Sprouts (Feb 9), Cabbage (Feb 9), Collards (Feb 9), Kale (Feb 9), Lettuce (Feb 9), +4 more. Plant: Strawberry (Feb 2). |
| March | Direct sow from: Sunflowers (Mar 9), Beans (Mar 16), Pole Beans (Mar 16). Transplant from: Bok Choy (Mar 2), Cauliflower (Mar 2), Cosmos (Mar 9), Lavender (Mar 9), Marigolds (Mar 9), Mint (Mar 9), +25 more. Last frost around March 9. |
| April | Frost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini. |
| 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 9), Pumpkin (Jul 9), Cantaloupe (Jul 17), Celery (Jul 17), Melons (Jul 17), Spaghetti Squash (Jul 19), +4 more. |
| August | Last sowing dates: Eggplant (Aug 1), Corn (Aug 3), Sunflowers (Aug 15), Brussel Sprouts (Aug 20), Pole Beans (Aug 20), Basil (Aug 25), +9 more. |
| September | Last sowing dates: Beans (Sep 1), Marigolds (Sep 4), Parsley (Sep 5), Peas (Sep 10), Cabbage (Sep 19), Carrots (Sep 19), +9 more. |
| October | Last sowing dates: Kale (Oct 4), Kohlrabi (Oct 4), Turnip (Oct 9), Arugula (Oct 19), Spinach (Oct 19), Radish (Oct 20). |
| November | Direct sow from: Garlic (Nov 21). First frost around November 21. |
| December | Start indoors: Chives (Dec 15), Lavender (Dec 15), Onion (Dec 15), Rosemary (Dec 15), Celery (Dec 29), Collards (Dec 29), +5 more. Last sowing dates: Garlic (Dec 12). |
Frequently Asked Questions
What is the last frost date for Slidell, LA (ZIP 70460)?
The median last spring frost date for Slidell, LA (ZIP code 70460) is around March 9. 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 February 17; one in ten it runs past March 28.
What is the first fall frost date in Slidell, LA?
The median first fall frost date for Slidell, LA is around November 21. 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 30 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Slidell, LA?
The frost-free growing season in Slidell is about 257 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 Slidell (257 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 Slidell, LA?
Slidell, LA is in USDA hardiness zone 9a (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 Slidell, LA?
Start tomatoes indoors Feb 2 and plant out Mar 23 in Slidell. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Slidell?
Two: plant Feb 9 and again by Sep 30; both mature before Nov 28.
When do I plant garlic in Slidell?
Nov 21 to Dec 12; it overwinters and is ready the following summer.
Can I get two tomato crops in Slidell?
Yes: plant out Mar 23 for a summer crop, and set out a second round of transplants by Jul 22 for a fall crop.
Which nearby ZIP has a longer season?
Slidell (ZIP 70458) has 271 frost-free days, 14 more than Slidell (ZIP 70460). See Slidell ZIP 70458 frost dates
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