When to Plant Cilantro in Lafourche Parish, LA
May to-do list for Lafourche Parish, Louisiana
We've pulled the most time-sensitive tasks for Lafourche Parish, Louisiana this May and put them front and centre. Tackle them in order.
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Harvest cilantro as they ripen
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
Cilantro is a dual-purpose herb providing fresh leaves (cilantro) and dried seeds (coriander). It bolts quickly in heat, producing flowers beloved by beneficial insects.
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 Cilantro may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Cilantro will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Cilantro 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 Cilantro's growing requirements.
Soil pH
Your soil pH (5.0–6.2) is more acidic than Cilantro 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. Cilantro will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Cilantro.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Cilantro.
How to Plant Cilantro
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Cilantro
Sow every 4.6 weeks. Last sowing by Oct 19 to harvest before frost.
For a dedicated fall crop, sow by Oct 23.
Plant Water Budget
Monthly Watering Guide for Cilantro
Cilantro needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Cilantro Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 2.2" | 4.3" | 0" | ✅ Rainfall sufficient |
| Feb | 2.2" | 4.5" | 0" | ✅ Rainfall sufficient |
| Mar | 2.2" | 5.2" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 4.2" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 4.8" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 5.3" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 5.3" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 5.6" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 4.3" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 3.4" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 3.5" | 0" | ✅ Rainfall sufficient |
| Dec | 2.2" | 3.6" | 0" | ✅ Rainfall sufficient |
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.
Cilantro 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.
Cilantro Planting Timeline — Lafourche Parish, LA
Cilantro Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 30 | Dec 30 – Jan 13 |
| Transplant Outdoors | January 20 | Jan 20 – Feb 3 |
| Direct Sow | January 6 | Jan 6 – Jan 27 |
| Harvest | March 3 | Mar 3 – May 5 |
| Fall Sowing | October 23 | Oct 23 – Nov 6 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Transplant Outdoors Direct Sow |
| February | Transplant Outdoors |
| March | Harvest |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | Fall Sowing |
| December | Start Indoors |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
40–60 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9b
📆 Growing Season
325 days in Lafourche Parish
Growing Tips for Cilantro in Lafourche Parish
Direct sow Cilantro outdoors after January 27 in Lafourche Parish when soil has warmed and frost danger has passed.
Sandy soil in Lafourche Parish dries quickly — mulch Cilantro with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Summer highs in Lafourche Parish reach 97°F — grow Cilantro as a spring or fall crop. Use shade cloth if planting in summer.
Your generous 326.0-day season in Lafourche Parish allows multiple plantings of Cilantro. Sow every 20.0 days for continuous harvest.
Common pests for Cilantro in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Succession sow every 2-3 weeks. Provide afternoon shade in warm weather. Harvest leaves before flowering or allow some plants to go to seed for coriander and self-sowing.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Cilantro in Other Locations
Frequently Asked Questions
When should I plant Cilantro in Lafourche Parish, LA?
Lafourche Parish is in Zone 9b with an average last frost of January 27. Plan your Cilantro 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.