Frost Dates for Denham Springs, LA 70706
Denham Springs has 2 ZIP codes. The Denham Springs, LA frost page lists all of them with their dates.
Last spring frost March 2 · First fall frost November 21 · 264 frost-free days · USDA Zone 9a
Frost probability for 70706
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | March 23 | March 2 | February 8 |
| Fall (first frost) | November 3 | November 21 | December 10 |
Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (37.7 km away); the 50% date is the median year.
Month by month in Denham Springs
| Month | What to do |
|---|---|
| January | Start peppers and eggplant indoors 8–10 weeks before your last frost (around March 2). Start tomatoes about two weeks later, 6–8 weeks before last frost. |
| February | Start herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable. |
| March | Last frost around March 2. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings. |
| 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 | Midsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall. |
| August | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| September | Direct sow carrots and beets for fall harvest. Start fall broccoli and kale indoors. |
| October | First fall frost approaching (around November 21). Transplant fall brassicas. Sow spinach, arugula, and radishes. |
| November | First frost around November 21. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season. |
| December | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
What grows in a 264-day season
Frequently Asked Questions
What is the last frost date for Denham Springs, LA (ZIP 70706)?
The median last spring frost date for Denham Springs, LA (ZIP code 70706) is around March 2. 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.
What is the first fall frost date in Denham Springs, LA?
The median first fall frost date for Denham Springs, 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.
How long is the growing season in Denham Springs, LA?
The frost-free growing season in Denham Springs is about 264 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.
What USDA hardiness zone is Denham Springs, LA?
Based on frost date patterns, Denham Springs falls approximately in 9a. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.
When should I start tomatoes indoors in Denham Springs, LA?
Start tomato seeds indoors 6–8 weeks before your last frost date (around March 2). For Denham Springs, that's roughly January 6 to January 20. Transplant outdoors 1–2 weeks after your last frost.
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