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When to Plant Lentils in Jefferson Parish, LA

Jefferson Parish, Louisiana Zone 9b May

May to-do list for Jefferson Parish, Louisiana

May is a pivotal month for Jefferson Parish, Louisiana gardens. Focus on these tasks first and you'll set up the rest of the season for success.

Avg. last frost January 27
Avg. first frost December 18
Soil temp (4") 76°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
  1. Bring in the lentils

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

Get ahead of June
  • First harvests: lentils

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Lentils are an ancient pulse crop producing small, lens-shaped seeds packed with protein and iron. They grow on short, bushy plants and are surprisingly easy to cultivate.

Jefferson 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 314 feet, Jefferson Parish receives approximately 55.2 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 100°F, so Lentils may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Lentils will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lentils root diseases.

Jefferson 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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Jefferson Parish Soil Profile

Soil Type

Sandy Loam

Soil pH

5-6.1

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (196 days to spare)
Start indoors: Dec 23 Transplant: Jan 20 🍅 Harvest: Apr 14 – May 26
Recommended (50%) ✓ Fits season (199 days to spare)
Start indoors: Dec 30 Transplant: Jan 27 🍅 Harvest: Apr 21 – Jun 2
Safe Start (90%) ✓ Fits season (170 days to spare)
Start indoors: Feb 4 Transplant: Mar 4 🍅 Harvest: May 27 – Jul 8

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 Jefferson Parish

How your county's soil matches Lentils's growing requirements.

Soil pH

Your soil pH (5.0–6.1) is more acidic than Lentils prefers (6.0–8.0). Add garden lime to raise pH.

Soil Texture

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

Drainage

Lentils prefers dry conditions but your soil drains poorly. Use raised beds or mounded rows to prevent root rot.

Organic Matter

Organic matter is low (1.7%). Add 2-3 inches of compost before planting Lentils.

How to Plant Lentils

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Fall planting: Sow 8 weeks before your first frost date for a fall harvest.

Succession Planting Lentils

4
successive plantings in your 325-day season

Sow every 9.1 weeks. Last sowing by Aug 30 to harvest before frost.

For a dedicated fall crop, sow by Oct 23.

Plant Water Budget

Plant needs
0.6″/week
Rainfall provides
0.7″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Drought risk

Water stress score is 6/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Lentils

Lentils needs approximately 0.6 inches of water per week (2.6" per month). Here's how your county's rainfall compares month by month.

Month Lentils Needs Rainfall You Supplement Action
Jan 2.6" 4.6" 0" ✅ Rainfall sufficient
Feb 2.6" 4.4" 0" ✅ Rainfall sufficient
Mar 2.6" 4.8" 0" ✅ Rainfall sufficient
Apr 2.6" 4.4" 0" ✅ Rainfall sufficient
May 2.6" 4.1" 0" ✅ Rainfall sufficient
Jun 2.6" 5.7" 0" ✅ Rainfall sufficient
Jul 2.6" 5.9" 0" ✅ Rainfall sufficient
Aug 2.6" 5.2" 0" ✅ Rainfall sufficient
Sep 2.6" 3.6" 0" ✅ Rainfall sufficient
Oct 2.6" 3.7" 0" ✅ Rainfall sufficient
Nov 2.6" 4.8" 0" ✅ Rainfall sufficient
Dec 2.6" 3.9" 0" ✅ Rainfall sufficient

Water needs are for active growing months only (Jan–Dec in Jefferson Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Lentils 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.

Lentils needs ~2,375 GDD — county provides 8,150 GDD Excellent fit

Lentils Planting Timeline — Jefferson Parish, LA

Lentils Planting Calendar

Activity When Date Range
Start Indoors December 30 Dec 30 – Jan 13
Transplant Outdoors January 27 Jan 27 – Feb 10
Direct Sow January 6 Jan 6 – Jan 27
Harvest April 21 Apr 21 – Jun 2
Fall Sowing October 23 Oct 23 – Nov 6

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.6"/week · Natural rainfall sufficient

📅 Days to Maturity

80–110 days

🧪 Soil pH

Needs 6–8 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9b

📆 Growing Season

325 days in Jefferson Parish

Growing Tips for Lentils in Jefferson Parish

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

Sandy soil in Jefferson Parish dries quickly — mulch Lentils with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

With summer highs reaching 100°F in Jefferson Parish, provide afternoon shade for Lentils and water deeply in the morning.

Common pests for Lentils in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow in early spring as lentils tolerate frost. Provide short supports as plants tend to lodge. Harvest when lower pods turn brown. Pull entire plants and dry in bundles.

Companion Planting

Good Companions

Avoid Planting Near

  • Onion
  • Garlic

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Lentils in Jefferson Parish, LA?

Jefferson Parish is in Zone 9b with an average last frost of January 27. Plan your Lentils planting based on this frost date — see the calendar above for exact timing.

What planting zone is Jefferson Parish, LA?

Jefferson Parish, Louisiana is in USDA Hardiness Zone 9b. The average last spring frost is January 27 and first fall frost is December 18.

🌱

Your Jefferson Parish Garden Planner — Free

A 24-page printable planner built for Jefferson 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 Jefferson 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.