When to Plant Lemon Verbena in St. Bernard Parish, LA
May in St. Bernard Parish, Louisiana — your action list
A quick May briefing for St. Bernard Parish, Louisiana gardeners — what's urgent, what's next, and what can wait.
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It's harvest week for lemon verbena
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
June prep starts now
- First harvests: lemon verbena
Lemon verbena is a deciduous shrub with intensely lemon-scented leaves that retain their aroma when dried. It makes an exceptional tea and adds citrus flavor to dishes.
St. Bernard Parish, Louisiana is in USDA Zone 9b. The average last spring frost is February 2 and the first fall frost is December 11, giving you a growing season of approximately 312 days.
At an elevation of 455 feet, St. Bernard Parish receives approximately 51.7 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 104°F, so Lemon Verbena may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Lemon Verbena will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Lemon Verbena root diseases.
St. Bernard Parish Soil Profile
Soil Type
Sandy Loam
Soil pH
5.2-6.5
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. Bernard Parish
How your county's soil matches Lemon Verbena's growing requirements.
Soil pH
Your soil pH (5.2–6.5) is more acidic than Lemon Verbena prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
Sandy soil in St. Bernard Parish warms quickly in spring but drains fast. Lemon Verbena will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Lemon Verbena.
Organic Matter
Organic matter is moderate (2.0%). Annual compost additions will help Lemon Verbena.
How to Plant Lemon Verbena
Succession Planting Lemon Verbena
Sow every 6.9 weeks. Last sowing by Sep 12 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Lemon Verbena
Lemon Verbena needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Lemon Verbena Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.6" | 0" | ❄️ Dormant |
| Feb | 4.3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Mar | 4.3" | 5.3" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 4" | 0.3" | 💧 Light watering |
| May | 4.3" | 4.4" | 0" | ✅ Rainfall sufficient |
| Jun | 4.3" | 4.8" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 5.9" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 4.2" | 0.1" | 💧 Light watering |
| Sep | 4.3" | 3.6" | 0.7" | 💧 Light watering |
| Oct | 4.3" | 3.1" | 1.2" | 💧 Light watering |
| Nov | 4.3" | 3.9" | 0.4" | 💧 Light watering |
| Dec | 4.3" | 3.5" | 0.8" | 💧 Light watering |
Water needs are for active growing months only (Feb–Dec in St. Bernard Parish). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Lemon Verbena 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.
Lemon Verbena Planting Timeline — St. Bernard Parish, LA
Lemon Verbena Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 22 | Dec 22 – Jan 5 |
| Transplant Outdoors | February 9 | Feb 9 – Feb 23 |
| Direct Sow | February 9 | Feb 9 – Mar 2 |
| Harvest | April 13 | Apr 13 – Jun 22 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Transplant Outdoors Direct Sow |
| March | Direct Sow |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | Start Indoors |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Only during dry spells
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 9b
📆 Growing Season
312 days in St. Bernard Parish
Growing Tips for Lemon Verbena in St. Bernard Parish
Direct sow Lemon Verbena outdoors after February 02 in St. Bernard Parish when soil has warmed and frost danger has passed.
Sandy soil in St. Bernard Parish dries quickly — mulch Lemon Verbena with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 104°F in St. Bernard Parish, provide afternoon shade for Lemon Verbena and water deeply in the morning.
General growing tips
Grow in a container in cold climates and bring indoors for winter. Prune back hard in spring. Harvest leaves anytime but flavor peaks just before flowering. Dries well for tea.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Lemon Verbena in Other Locations
Frequently Asked Questions
When should I plant Lemon Verbena in St. Bernard Parish, LA?
St. Bernard Parish is in Zone 9b with an average last frost of February 2. Plan your Lemon Verbena planting based on this frost date — see the calendar above for exact timing.
What planting zone is St. Bernard Parish, LA?
St. Bernard Parish, Louisiana is in USDA Hardiness Zone 9b. The average last spring frost is February 2 and first fall frost is December 11.
Your St. Bernard Parish Garden Planner — Free
A 24-page printable planner built for St. Bernard 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.