USDA Hardiness Zone 9a
Frost Dates for 70456 — Roseland, Louisiana
Averages from Amite, La US, the nearest reporting station, 4.2 miles away.
Plant tender crops after March 7, and expect the first autumn freeze around November 18. That leaves about 257 frost-free days.
- Last spring frost
- March 7
- First fall frost
- November 18
- Growing season
- 257 days
- Hardiness zone
- 9a
50% probability
50% probability
frost-free
20 to 25°F annual low
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 5%
- Snow per year
- 0.1"
median, 1991–2020
median, 1991–2020
1 of 19 observed
NOAA normal
When it snows in Roseland, Louisiana
Measurable snow is rare here: only 1 of 19 winters from 1991 to 2020 recorded 0.1 inch or more at Amite, La US, so there is no typical first-snow date to plan around.
For a gardener, snow matters less than frost: a light snow on frozen ground changes nothing, while a hard frost on an unprotected bed ends the season. Use the frost dates above for planting and the snow dates for getting hoses drained, mulch down and tender pots indoors.
Planting calendar for 70456
| When | What to do |
|---|---|
| December 27 – January 10 | Start peppers and aubergines indoors They need eight to ten weeks under lights before they can go out. |
| January 10 – January 24 | Start tomatoes indoors Six to eight weeks gives a transplant big enough to set fruit early. |
| February 7 – February 21 | Sow peas, spinach, lettuce, radish outdoors These tolerate light frost and prefer to germinate in cool soil. |
| March 7 onward | Transplant tomatoes, peppers, basil, squash, cucumbers The average last freeze has passed — still watch the actual forecast. |
| by August 26 | Sow the autumn crop of carrots, beets and brassicas They need about twelve weeks to size up before growth stops. |
| by November 4 | Harvest tender crops, or be ready to cover them A first freeze two weeks early is well within normal variation. |
| November 18 onward | Plant garlic, mulch beds, lift tender bulbs Garlic wants a cold spell; bare soil loses structure over winter. |
What these dates mean
Wait until after March 7 to put tender plants — tomatoes, peppers, basil, squash — in the ground. That is the date by which half of years in Roseland, Louisiana are past their last freeze. Harvest before November 18, which leaves roughly 257 frost-free days.
ZIP 70456 sits in USDA hardiness zone 9a, meaning the average coldest night of the year falls between 20 to 25°F. Zone decides what survives the winter; frost dates decide when to plant each spring. They are different questions, and a plant can pass one and fail the other.
These are thirty-year NOAA averages for 1991–2020, not a forecast. Any individual year can frost two to three weeks either side of these dates, so check the actual forecast before planting out.