When to Plant Parsley in Jefferson Parish, LA
May in Jefferson Parish, Louisiana — your action list
Your garden in Jefferson Parish, Louisiana is working on a schedule, even when you're not. Here's where you should be this May.
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Pick parsley
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
Parsley is a biennial herb available in flat-leaf (Italian) and curly varieties. It is a nutritional powerhouse rich in vitamins C and K and adds fresh flavor to countless dishes.
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 Parsley may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Parsley will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Parsley root diseases.
Jefferson Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
5-6.1
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 Jefferson Parish
How your county's soil matches Parsley's growing requirements.
Soil pH
Your soil pH (5.0–6.1) is more acidic than Parsley prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in Jefferson Parish warms quickly in spring but drains fast. Parsley will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Parsley.
Organic Matter
Organic matter is low (1.7%). Add 2-3 inches of compost before planting Parsley.
How to Plant Parsley
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Parsley
Sow every 6.9 weeks. Last sowing by Sep 29 to harvest before frost.
For a dedicated fall crop, sow by Oct 23.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Parsley
Parsley 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 | Parsley 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.
Parsley 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.
Parsley Planting Timeline — Jefferson Parish, LA
Parsley 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 24 | Mar 24 – May 26 |
| 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
0.6"/week · Natural rainfall sufficient
📅 Days to Maturity
60–80 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9b
📆 Growing Season
325 days in Jefferson Parish
Growing Tips for Parsley in Jefferson Parish
Direct sow Parsley outdoors after January 27 in Jefferson Parish when soil has warmed and frost danger has passed.
Sandy soil in Jefferson Parish dries quickly — mulch Parsley 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 Parsley and water deeply in the morning.
Common pests for Parsley in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
General growing tips
Start seeds indoors 6-8 weeks before last frost. Soak seeds overnight as germination is slow. Harvest outer stems first to keep plants productive. Parsley attracts swallowtail butterflies.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Parsley in Other Locations
Frequently Asked Questions
When should I plant Parsley in Jefferson Parish, LA?
Jefferson Parish is in Zone 9b with an average last frost of January 27. Plan your Parsley 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.