When to Plant Shiso in Evangeline Parish, LA
Your May planting checklist for Evangeline Parish, Louisiana
Welcome to May in Zone 9a. These are the moves that will have the biggest impact on your growing season.
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Harvest shiso as they ripen
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
Before June arrives, get these ready
- First harvests: shiso
Shiso (perilla) is a fragrant Japanese herb with large, ruffled leaves in green or purple varieties. It has a unique flavor combining mint, basil, and anise.
Evangeline Parish, Louisiana is in USDA Zone 9a. The average last spring frost is February 22 and the first fall frost is November 28, giving you a growing season of approximately 279 days.
At an elevation of 203 feet, Evangeline Parish receives approximately 59.5 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 90°F, providing good warmth for Shiso during the growing season. Sandy soil warms quickly in spring — great for early planting — but Shiso will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Shiso root diseases.
Evangeline Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
5.1-6.3
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 Evangeline Parish
How your county's soil matches Shiso's growing requirements.
Soil pH
Your soil pH (5.1–6.3) overlaps with Shiso's range (5.5–7.0), though not a perfect match.
Soil Texture
Sandy soil in Evangeline Parish warms quickly in spring but drains fast. Shiso will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Shiso.
Organic Matter
Organic matter is moderate (2.2%). Annual compost additions will help Shiso.
How to Plant Shiso
Succession Planting Shiso
Sow every 5.7 weeks. Last sowing by Sep 19 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Shiso
Shiso needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Shiso Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 5.4" | 0" | ❄️ Dormant |
| Feb | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Mar | 4.3" | 5.4" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| May | 4.3" | 4.3" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 6.2" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 6.6" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 5.3" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 4.5" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Nov | 4.3" | 4" | 0.3" | 💧 Light watering |
| Dec | — | 4.5" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Feb–Nov in Evangeline Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Shiso 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.
Shiso Planting Timeline — Evangeline Parish, LA
Shiso Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 11 | Jan 11 – Jan 25 |
| Transplant Outdoors | March 1 | Mar 1 – Mar 15 |
| Direct Sow | March 1 | Mar 1 – Mar 22 |
| Harvest | April 26 | Apr 26 – Jun 21 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | — |
| March | Transplant Outdoors Direct Sow |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 5.5–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 9a
📆 Growing Season
279 days in Evangeline Parish
Growing Tips for Shiso in Evangeline Parish
Direct sow Shiso outdoors after February 22 in Evangeline Parish when soil has warmed and frost danger has passed.
Sandy soil in Evangeline Parish dries quickly — mulch Shiso with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
General growing tips
Direct sow after last frost or start indoors. Both green and red varieties are available. Pinch tips to encourage bushiness. Self-sows prolifically; deadhead to control.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Shiso in Other Locations
Frequently Asked Questions
When should I plant Shiso in Evangeline Parish, LA?
Evangeline Parish is in Zone 9a with an average last frost of February 22. Plan your Shiso planting based on this frost date — see the calendar above for exact timing.
What planting zone is Evangeline Parish, LA?
Evangeline Parish, Louisiana is in USDA Hardiness Zone 9a. The average last spring frost is February 22 and first fall frost is November 28.
Your Evangeline Parish Garden Planner — Free
A 24-page printable planner built for Evangeline Parish (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.