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When to Plant Cucumber in Lafourche Parish, LA

Lafourche Parish, Louisiana Zone 9b May

Top priorities for Lafourche Parish, Louisiana gardeners in May

Each item below is timed to Lafourche Parish, Louisiana's frost dates and soil temperatures. Skip nothing, stress about nothing.

Avg. last frost January 27
Avg. first frost December 18
Soil temp (4") 79°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
  1. Collect cucumber at their peak

    If you can't use it all right away, check the food-preservation section of your planner.

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Cucumbers are a warm-season vine crop available in slicing and pickling varieties. They are prolific producers when given warmth, moisture, and a trellis to climb.

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 Cucumber may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Cucumber will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Cucumber root diseases.

Lafourche Parish, LA (Zone 9b) Year-round
325 days
Last Spring Frost January 27
325 growing days
First Fall Frost December 18
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Lafourche Parish Soil Profile

Soil Type

Sandy Loam

Soil pH

5-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (203 days to spare)
Start indoors: Dec 23 Transplant: Jan 27 🍅 Harvest: Mar 24 – May 19
Recommended (50%) ✓ Fits season (206 days to spare)
Start indoors: Dec 30 Transplant: Feb 3 🍅 Harvest: Mar 31 – May 26
Safe Start (90%) ✓ Fits season (177 days to spare)
Start indoors: Feb 4 Transplant: Mar 11 🍅 Harvest: May 6 – Jul 1

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 Cucumber's growing requirements.

Soil pH

Your soil pH (5.0–6.2) is more acidic than Cucumber prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

Sandy soil in Lafourche Parish warms quickly in spring but drains fast. Cucumber will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Cucumber.

Organic Matter

Organic matter is moderate (2.1%). Annual compost additions will help Cucumber.

How to Plant Cucumber

0.5"
Planting Depth
24"
Between Plants
48"
Between Rows

Succession Planting Cucumber

7
successive plantings in your 325-day season

Sow every 5.7 weeks. Last sowing by Oct 09 to harvest before frost.

Plant Water Budget

Plant needs
1.5″/week
Rainfall provides
0.7″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 1,028 gal / 100 sq ft

Monthly Watering Guide for Cucumber

Cucumber needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.

Month Cucumber Needs Rainfall You Supplement Action
Jan 6.5" 4.3" 2.2" 💧 Light watering
Feb 6.5" 4.5" 2" 💧 Light watering
Mar 6.5" 5.2" 1.3" 💧 Light watering
Apr 6.5" 4.2" 2.3" 💧 Light watering
May 6.5" 4.8" 1.7" 💧 Light watering
Jun 6.5" 5.3" 1.2" 💧 Light watering
Jul 6.5" 5.3" 1.2" 💧 Light watering
Aug 6.5" 5.6" 0.9" 💧 Light watering
Sep 6.5" 4.3" 2.2" 💧 Light watering
Oct 6.5" 3.4" 3.1" 💧 Light watering
Nov 6.5" 3.5" 3" 💧 Light watering
Dec 6.5" 3.6" 2.9" 💧 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.

Cucumber 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.

Cucumber needs ~1,365 GDD — county provides 7,416 GDD Excellent fit

Cucumber Planting Timeline — Lafourche Parish, LA

Cucumber Planting Calendar

Activity When Date Range
Start Indoors December 30 Dec 30 – Jan 13
Transplant Outdoors February 3 Feb 3 – Feb 17
Direct Sow January 27 Jan 27 – Feb 17
Harvest March 31 Mar 31 – May 26

Plant 0.5" deep · 24" apart · Rows 48" apart

Month-by-Month Timeline

MonthActivities
January Start Indoors Direct Sow
February Transplant Outdoors Direct Sow
March Harvest
April Harvest
May Harvest
June
July
August
September
October
November
December Start Indoors
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1.5"/week · 1-2 times/week

📅 Days to Maturity

50–70 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9b

📆 Growing Season

325 days in Lafourche Parish

Growing Tips for Cucumber in Lafourche Parish

Direct sow Cucumber outdoors after January 27 in Lafourche Parish when soil has warmed and frost danger has passed.

Sandy soil in Lafourche Parish dries quickly — mulch Cucumber 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 Cucumber and water deeply in the morning.

Common pests for Cucumber in this region include squash vine borer and cucumber beetles. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow after last frost or start indoors 3 weeks early. Provide a trellis for vining types to save space and improve air circulation. Harvest frequently to encourage production.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes
  • Sage

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Cucumber in Lafourche Parish, LA?

Lafourche Parish is in Zone 9b with an average last frost of January 27. Plan your Cucumber 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.

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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.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Lafourche Parish, LA. Local conditions may vary. Last updated: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.