When to Plant Stevia in St. Lucie County, FL
What to do in May
Welcome to May in Zone 10a. These are the moves that will have the biggest impact on your growing season.
-
Pick stevia
This is the payoff month. Bring a basket, bring a friend, and get into the beds.
Get ahead of June
- First harvests: stevia
Stevia is a subtropical herb whose leaves contain natural sweeteners 200-300 times sweeter than sugar. It is grown as an annual in most climates.
St. Lucie County, Florida is in USDA Zone 10a. The average last spring frost is January 29 and the first fall frost is December 16, giving you a growing season of approximately 321 days.
At an elevation of 185 feet, St. Lucie County receives approximately 56.2 inches of rainfall annually with predominantly sand soil. Summer highs average 89°F, providing good warmth for Stevia during the growing season. Sandy soil warms quickly in spring — great for early planting — but Stevia will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Stevia root diseases.
St. Lucie County Soil Profile
Soil Type
Sand
Soil pH
4.8-5.8
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. Lucie County
How your county's soil matches Stevia's growing requirements.
Soil pH
Your soil pH (4.8–5.8) is more acidic than Stevia prefers (6.5–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in St. Lucie County warms quickly in spring but drains fast. Stevia will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Stevia.
Organic Matter
Organic matter is low (1.3%). Add 2-3 inches of compost before planting Stevia.
How to Plant Stevia
Succession Planting Stevia
Sow every 6.9 weeks. Last sowing by Sep 17 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Stevia
Stevia needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Stevia Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | 2.2" | 2.3" | 0" | ✅ Rainfall sufficient |
| Feb | 2.2" | 2.7" | 0" | ✅ Rainfall sufficient |
| Mar | 2.2" | 3.3" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 2.2" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 3.1" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 8.1" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 9" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 8.6" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 7.5" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 5" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 2.1" | 0.1" | 💧 Light watering |
| Dec | 2.2" | 2.2" | 0" | ✅ Rainfall sufficient |
Water needs are for active growing months only (Jan–Dec in St. Lucie County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Stevia 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.
Stevia Planting Timeline — St. Lucie County, FL
Stevia Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | December 18 | Dec 18 – Jan 1 |
| Transplant Outdoors | February 5 | Feb 5 – Feb 19 |
| Direct Sow | February 5 | Feb 5 – Feb 26 |
| Harvest | April 9 | Apr 9 – Jun 18 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Transplant Outdoors Direct Sow |
| March | — |
| April | Harvest |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | Start Indoors |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
60–90 days
🧪 Soil pH
Needs 6.5–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 10a
📆 Growing Season
321 days in St. Lucie County
Growing Tips for Stevia in St. Lucie County
Direct sow Stevia outdoors after January 29 in St. Lucie County when soil has warmed and frost danger has passed.
Sandy soil in St. Lucie County dries quickly — mulch Stevia with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Stevia in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
With 56" of annual rainfall in St. Lucie County, ensure good drainage for Stevia — excess moisture can promote root rot and fungal diseases.
General growing tips
Start seeds indoors under lights or buy transplants. Pinch flowers to encourage leaf production. Harvest leaves before flowering for maximum sweetness. Dry leaves for year-round use.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Stevia in Other Locations
Frequently Asked Questions
When should I plant Stevia in St. Lucie County, FL?
St. Lucie County is in Zone 10a with an average last frost of January 29. Plan your Stevia planting based on this frost date — see the calendar above for exact timing.
What planting zone is St. Lucie County, FL?
St. Lucie County, Florida is in USDA Hardiness Zone 10a. The average last spring frost is January 29 and first fall frost is December 16.
Your St. Lucie County Garden Planner — Free
A 24-page printable planner built for St. Lucie County (Zone 10a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.