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When to Plant Lemon Verbena in Franklin County, FL

Franklin County, Florida Zone 9a May

May in Franklin County, Florida — your action list

A quick May briefing for Franklin County, Florida gardeners — what's urgent, what's next, and what can wait.

Avg. last frost February 25
Avg. first frost November 28
Soil temp (4") 73°F
Watering Low
Pest pressure High
Daylight 13.5 hrs
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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.

Franklin County, Florida is in USDA Zone 9a. The average last spring frost is February 25 and the first fall frost is November 28, giving you a growing season of approximately 276 days.

At an elevation of 487 feet, Franklin County receives approximately 59.9 inches of rainfall annually with predominantly sand soil. Summer highs average 96°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.

Franklin County, FL (Zone 9a) Year-round
276 days
Last Spring Frost February 25
276 growing days
First Fall Frost November 28

Franklin County Soil Profile

Soil Type

Sand

Soil pH

4.9-6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (146 days to spare)
Start indoors: Dec 28 Transplant: Feb 15 🍅 Harvest: Apr 19 – Jun 28
Recommended (50%) ✓ Fits season (136 days to spare)
Start indoors: Jan 14 Transplant: Mar 4 🍅 Harvest: May 6 – Jul 15
Safe Start (90%) ✓ Fits season (137 days to spare)
Start indoors: Feb 3 Transplant: Mar 24 🍅 Harvest: May 26 – Aug 4

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 Franklin County

How your county's soil matches Lemon Verbena's growing requirements.

Soil pH

Your soil pH (4.9–6.0) is more acidic than Lemon Verbena prefers (6.0–7.0). Add garden lime to raise pH.

Soil Texture

Sandy soil in Franklin County 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 low (1.6%). Add 2-3 inches of compost before planting Lemon Verbena.

How to Plant Lemon Verbena

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Succession Planting Lemon Verbena

5
successive plantings in your 276-day season

Sow every 6.9 weeks. Last sowing by Aug 30 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.9″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 966 gal / 100 sq ft

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 2.6" 0" ❄️ Dormant
Feb 4.3" 2.8" 1.5" 💧 Light watering
Mar 4.3" 3.2" 1.1" 💧 Light watering
Apr 4.3" 2.6" 1.7" 💧 Light watering
May 4.3" 4" 0.3" 💧 Light watering
Jun 4.3" 7.6" 0" ✅ Rainfall sufficient
Jul 4.3" 9.2" 0" ✅ Rainfall sufficient
Aug 4.3" 10" 0" ✅ Rainfall sufficient
Sep 4.3" 7.4" 0" ✅ Rainfall sufficient
Oct 4.3" 4.9" 0" ✅ Rainfall sufficient
Nov 4.3" 2.9" 1.4" 💧 Light watering
Dec 2.8" 0" ❄️ Dormant

Water needs are for active growing months only (Feb–Nov in Franklin County). 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 needs ~1,650 GDD — county provides 6,094 GDD Excellent fit

Lemon Verbena Planting Timeline — Franklin County, FL

Lemon Verbena Planting Calendar

Activity When Date Range
Start Indoors January 14 Jan 14 – Jan 28
Transplant Outdoors March 4 Mar 4 – Mar 18
Direct Sow March 4 Mar 4 – Mar 25
Harvest May 6 May 6 – Jul 15

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
January Start Indoors
February
March Transplant Outdoors Direct Sow
April
May Harvest
June Harvest
July Harvest
August
September
October
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 1-2 times/week

📅 Days to Maturity

60–90 days

🧪 Soil pH

Needs 6–7 · Your soil: too_acidic

🗺️ USDA Zone

Zone 9a

📆 Growing Season

276 days in Franklin County

Growing Tips for Lemon Verbena in Franklin County

Direct sow Lemon Verbena outdoors after February 25 in Franklin County when soil has warmed and frost danger has passed.

Sandy soil in Franklin County 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 96°F in Franklin County, 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 →

Frequently Asked Questions

When should I plant Lemon Verbena in Franklin County, FL?

Franklin County is in Zone 9a with an average last frost of February 25. Plan your Lemon Verbena planting based on this frost date — see the calendar above for exact timing.

What planting zone is Franklin County, FL?

Franklin County, Florida is in USDA Hardiness Zone 9a. The average last spring frost is February 25 and first fall frost is November 28.

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Your Franklin County Garden Planner — Free

A 24-page printable planner built for Franklin County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Franklin County, FL. Local conditions may vary. Last updated: May 2026.

Sources & credits

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