Conditional — Some Areas
white lupin (zones 5-10) has limited zone overlap with Louisiana (8a-9b). Only zones 8-9 in the state are suitable.
Your yard isn't the whole zone.
White Lupin is grown as an annual, so your winter zone isn't the deciding factor — your frost-free window is, and slope, trees, and low spots move the last-frost date across a single yard. Enter your address and we'll score white lupin against your parcel's actual frost dates, sun, and soil.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Zone Comparison
White Lupin Needs
- USDA Zones: 5-10
- Soil pH: 4.8 - 8.2
- Sun: Full Sun
- Drainage: well (dry spells)
- Frost-Free Days: 90+
Louisiana Has
- USDA Zones: 8a-9b
- Last Frost: Feb 15 - Mar 15
- First Frost: Nov 10 - Dec 10
- Annual Rainfall: 50-65 inches
- Common Soils: Alluvial clay, Muck, Sandy loam
Plant Zone Range (zones 5-10)
Preferred Soil pH
Plant data: USDA PLANTS Database / plant_species_v5.csv. State data: USDA ARS PHZM 2023, NOAA Climate Normals, NRCS SSURGO.
When to Plant White Lupin in Louisiana
The frost window
Across Louisiana, the last spring frost clears between Feb 15 and Mar 15, and the first fall frost lands between Nov 10 and Dec 10 (NOAA Climate Normals 1991-2020). Counting from the latest last frost to the earliest first frost, that's a 240-day window you can count on — up to 298 days on a mild site in a kind year.
Frost tenderness
White Lupin is frost-tender — its listed minimum temperature is 42.8°F (USDA PLANTS Database) — so set plants out after the last frost has cleared your local site, not the state's earliest date.
Days to maturity vs. the window
At 120 days to maturity (USDA PLANTS Database), a planting right after last frost ripens with 120 days to spare even in Louisiana's tightest frost scenario — room for a later start or a second sowing.
Frost window: NOAA Climate Normals 1991-2020. Plant timing fields: USDA PLANTS Database. Your site's own frost dates can run earlier or later than the state range — a parcel report pins them down.
Growing Season Fit
Zone compatibility says you can survive winter here. Whether the growing season is long enough — and warm enough — is a different question.
Frost-free days
White Lupin wants 90+ frost-free days; a typical Louisiana site sees ~320 (NOAA Climate Normals). That leaves comfortable headroom for succession planting.
Growing degree days
White Lupin needs ~1200 GDD (base 50°F) to ripen. The state median runs ~5000 GDD (USDA NRCS county aggregates), so Louisiana's typical season clears that easily.
Climate aggregates derive from USDA NRCS county-level hardiness data + Cornell CALS Extension GDD-by-region tables + MSU Extension chill-hours-by-zone (1991-2020 NOAA Climate Normals baseline).
Soil + Drainage Fit
White Lupin likes near-neutral soil (pH 4.8-8.2). That's the common-ground band across Louisiana's alluvial clay and muck — a soil test confirms it for your site. Drainage matters: this plant wants well (dry spells). If your Louisiana site is heavier clay or sits in a low spot, raised beds or amendment with compost solve it.
Plant pH and drainage requirements from USDA PLANTS Database. Louisiana soil profile from USDA NRCS SSURGO. Site-specific verification: a 30-minute soil test from your local Extension lab.
White Lupin in Louisiana — Quick Answer
- Verdict: Conditional — Some Areas
- Plant Zones: 5-10 (USDA PLANTS Database)
- State Zones: 8a-9b (USDA ARS PHZM 2023)
- Growing Season: Feb 15 - Mar 15 to Nov 10 - Dec 10 (NOAA Climate Normals)
- Days to Maturity: 120 days
What Else to Consider
Zone compatibility tells you about winter cold survival — but Louisiana growers also need to think about:
Extreme humidity and rainfall promote rot and fungal diseases
Raised rows, morning base-watering, and generous spacing keep the wet at bay — extension's resistant-variety lists do the rest.
Poor drainage in delta and coastal areas
Where ground stays wet, grow up — mounded rows and raised beds keep roots breathing through the wettest months.
Hurricane damage risk from June through November
Wind-tough perennials, proper staking, and fall crops in movable containers take the sting out of storm season.
Pollinator + Wildlife Value
White Lupin draws pollinators (moderate value, USDA PLANTS Database). Planting it near vegetable beds can lift fruit set on neighboring crops.
Louisiana Cooperative Extension
For Louisiana-specific cultivar recommendations, planting calendars, and pest pressure for white lupin, the canonical source is LSU AgCenter. Their fact sheets carry the local trial data we can't generalize across 50 states.
Is White Lupin native to Louisiana?
No — the USDA PLANTS Database lists White Lupin as introduced rather than native in the Lower 48, so it is not part of Louisiana's native flora. It grows here as a garden plant; pairing it with a few Louisiana natives keeps local pollinators fed too.
Looking for plants that belong here? The Louisiana growing guide lists USDA-documented natives for the state.
Native-range data: USDA PLANTS Database state-distribution records, accessed 2026-07-01.
Common Questions About Growing White Lupin in Louisiana
When can I plant White Lupin in Louisiana?
Louisiana's last spring frost clears between Feb 15 and Mar 15, and the first fall frost lands between Nov 10 and Dec 10 (NOAA Climate Normals 1991-2020). White Lupin is frost-tender — its listed minimum temperature is 42.8°F (USDA PLANTS Database) — so wait until the last frost has cleared your specific site before planting out.
Can White Lupin mature before first frost in Louisiana?
Yes — White Lupin matures in 120 days (USDA PLANTS Database), and Louisiana's dependable frost-free window runs 240 days (NOAA Climate Normals 1991-2020), leaving 120 days of margin. Plant just after last frost and it ripens ahead of the first fall frost.
What hardiness zone is White Lupin grown in across Louisiana?
Louisiana spans USDA hardiness zones 8a-9b (USDA ARS PHZM 2023). White Lupin carries a range of zones 5-10, so the overlap zones are where outdoor growing is most reliable.
How many frost-free days does a typical Louisiana site have?
A typical Louisiana site sees ~320 frost-free days per year (derived from NOAA Climate Normals 1991-2020). White Lupin needs 90+ frost-free days, so check whether your local microclimate runs above or below the state average before settling on a planting date.
Is White Lupin native to Louisiana?
No — the USDA PLANTS Database lists White Lupin as introduced rather than native in the Lower 48, so it is not part of Louisiana's native flora. It grows here as a garden plant; pairing it with a few Louisiana natives keeps local pollinators fed too.
How should I amend the soil for White Lupin in Louisiana?
White Lupin prefers pH 4.8-8.2 and well (dry spells) drainage (USDA PLANTS Database). That sits in the common-ground band across Louisiana soils — a 30-minute soil test from a local Extension lab confirms it for your specific site.
Will White Lupin actually grow on my specific land in Louisiana?
State-level zone + climate data is a sketch. A Growable Ground parcel report scores white lupin against your address's exact soil pH, drainage, sun, and frost-date data drawn from USDA SSURGO, NOAA, and PRISM — not state averages.
Check your specific parcel in Louisiana
State-level data is a sketch. Your Growable Ground report scores white lupin against your parcel's exact soil, sun, drainage, and frost data — not zone averages.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds