When to Plant Potatoes in Lafourche Parish, LA
May in Lafourche Parish, Louisiana — your action list
If you only do a handful of things in the garden this May, make it these. They're sequenced around your zone's frost timing.
-
It's harvest week for potatoes
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
June will be here before you know it — start on
- First harvests: potatoes
Potatoes are a versatile staple crop that produces tubers underground. They come in hundreds of varieties with varying colors, textures, and maturity dates.
Lafourche Parish, Louisiana is in USDA Zone 9b. The average last spring frost is January 27 and the first fall frost is December 18, giving you a growing season of approximately 325 days.
At an elevation of 306 feet, Lafourche Parish receives approximately 54 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 97°F, so Potatoes may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Potatoes will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Potatoes root diseases.
Lafourche Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
5-6.2
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Lafourche Parish
How your county's soil matches Potatoes's growing requirements.
Soil pH
Your soil pH (5.0–6.2) is within Potatoes's preferred range (5.0–6.5).
Soil Texture
Sandy soil in Lafourche Parish warms quickly in spring but drains fast. Potatoes will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Potatoes.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Potatoes.
How to Plant Potatoes
Succession Planting Potatoes
Sow every 8 weeks. Last sowing by Aug 20 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Potatoes
Potatoes needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Potatoes Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Feb | 4.3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Mar | 4.3" | 5.2" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 4.2" | 0.1" | 💧 Light watering |
| May | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 5.3" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 5.3" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 5.6" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 3.4" | 0.9" | 💧 Light watering |
| Nov | 4.3" | 3.5" | 0.8" | 💧 Light watering |
| Dec | 4.3" | 3.6" | 0.7" | 💧 Light watering |
Water needs are for active growing months only (Jan–Dec in Lafourche Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Potatoes Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Potatoes Planting Timeline — Lafourche Parish, LA
Potatoes Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 16 | Dec 16 – Dec 30 |
| Transplant Outdoors | February 3 | Feb 3 – Feb 17 |
| Direct Sow | January 27 | Jan 27 – Feb 17 |
| Harvest | April 14 | Apr 14 – Jun 23 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | — |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | Start Indoors |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Only during dry spells
📅 Days to Maturity
70–120 days
🧪 Soil pH
Needs 5–6.5 · Your soil: ideal
🗺️ USDA Zone
Zone 9b
📆 Growing Season
325 days in Lafourche Parish
Growing Tips for Potatoes in Lafourche Parish
Direct sow Potatoes outdoors after January 27 in Lafourche Parish when soil has warmed and frost danger has passed.
Sandy soil in Lafourche Parish dries quickly — mulch Potatoes with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 97°F in Lafourche Parish, provide afternoon shade for Potatoes and water deeply in the morning.
Common pests for Potatoes in this region include tomato hornworm and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Plant seed potatoes (not grocery store potatoes) 4 inches deep in spring. Hill soil around stems as plants grow to prevent greening. Stop watering when plants die back.
Companion Planting
Good Companions
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Check more plant combinations with our Companion Planting Checker →
Potatoes in Other Locations
Frequently Asked Questions
When should I plant Potatoes in Lafourche Parish, LA?
Lafourche Parish is in Zone 9b with an average last frost of January 27. Plan your Potatoes planting based on this frost date — see the calendar above for exact timing.
What planting zone is Lafourche Parish, LA?
Lafourche Parish, Louisiana is in USDA Hardiness Zone 9b. The average last spring frost is January 27 and first fall frost is December 18.
Your Lafourche Parish Garden Planner — Free
A 24-page printable planner built for Lafourche Parish (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.