When to Plant Mint in St. John the Baptist Parish, LA
St. John the Baptist Parish, Louisiana gardeners: here's your May plan
Each item below is timed to St. John the Baptist Parish, Louisiana's frost dates and soil temperatures. Skip nothing, stress about nothing.
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Bring in the mint
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
Coming up in June — start thinking about
- First harvests: mint
Mint is a vigorous perennial herb with refreshing, aromatic leaves used in teas, cocktails, and cooking. It spreads aggressively by underground runners.
St. John the Baptist Parish, Louisiana is in USDA Zone 9b. The average last spring frost is February 20 and the first fall frost is December 1, giving you a growing season of approximately 284 days.
At an elevation of 309 feet, St. John the Baptist Parish receives approximately 53.7 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 103°F, so Mint may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Mint will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Mint root diseases.
St. John the Baptist Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
4.8-6.1
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 St. John the Baptist Parish
How your county's soil matches Mint's growing requirements.
Soil pH
Your soil pH (4.8–6.1) is more acidic than Mint prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in St. John the Baptist Parish warms quickly in spring but drains fast. Mint will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Mint.
Organic Matter
Organic matter is moderate (2.1%). Annual compost additions will help Mint.
How to Plant Mint
Succession Planting Mint
Sow every 6.9 weeks. Last sowing by Sep 02 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Mint
Mint needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Mint Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4" | 0" | ❄️ Dormant |
| Feb | 3" | 4" | 0" | ✅ Rainfall sufficient |
| Mar | 3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 4" | 0" | ✅ Rainfall sufficient |
| May | 3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 5" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 6.3" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 3.7" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 3.5" | 0" | ✅ Rainfall sufficient |
| Dec | 3" | 4.8" | 0" | ✅ Rainfall sufficient |
Water needs are for active growing months only (Feb–Dec in St. John the Baptist Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Mint 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.
Mint Planting Timeline — St. John the Baptist Parish, LA
Mint Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | February 27 | Feb 27 – Mar 13 |
| Harvest | May 1 | May 1 – Jul 10 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Transplant Outdoors |
| March | Transplant Outdoors |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9b
📆 Growing Season
284 days in St. John the Baptist Parish
Growing Tips for Mint in St. John the Baptist Parish
Direct sow Mint outdoors after February 20 in St. John the Baptist Parish when soil has warmed and frost danger has passed.
Sandy soil in St. John the Baptist Parish dries quickly — mulch Mint with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 103°F in St. John the Baptist Parish, provide afternoon shade for Mint and water deeply in the morning.
General growing tips
Always grow mint in containers or with underground barriers to control spreading. Harvest regularly to keep plants compact. Cut plants back in late summer for a fresh fall flush.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Mint in Other Locations
Frequently Asked Questions
When should I plant Mint in St. John the Baptist Parish, LA?
St. John the Baptist Parish is in Zone 9b with an average last frost of February 20. Plan your Mint planting based on this frost date — see the calendar above for exact timing.
What planting zone is St. John the Baptist Parish, LA?
St. John the Baptist Parish, Louisiana is in USDA Hardiness Zone 9b. The average last spring frost is February 20 and first fall frost is December 1.
Your St. John the Baptist Parish Garden Planner — Free
A 24-page printable planner built for St. John the Baptist 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.