When to Plant Stevia in Saint Petersburg, Florida (33708)

Location

Saint Petersburg, Florida

ZIP Code

33708

USDA Zone

10b

Last Frost

Thursday, January 15, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Thursday, November 6, 2025

Transplant Outdoors

Thursday, January 29, 2026

Based on last frost Thursday, January 15, 2026 · Zone 10b

Pro tip: Start Stevia seeds indoors 10 weeks before your last frost date, then transplant outdoors around Thursday, January 29, 2026.

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🌿 Plant Details

Scientific Name Stevia rebaudiana

Days to Maturity 90 days

Mature Height 18-24"

Spread 18"

Type Tender Perennial

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (consistent moisture)

↔️

Spacing

18" apart

🌱

Planting Depth

0.13" deep

Seeds typically germinate in 14-21 days

Ready to Plant Stevia in Saint Petersburg?

Get your seeds now so they're ready by Thursday, November 6, 2025.

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🤝 Good Companions

PepperTomatoBasil

⚠️ Avoid Planting Near

Fennel

🤝

Full Companion Planting Guide for Stevia

See which plants help Stevia thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Harvest seed heads when brown and dry in fall, just before the first frost.

Processing

Strip dried flower heads, separate chaff, surface sow immediately or store cool and dry.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Stevia germination rates can be low (20–50%). Surface sow and provide light — seeds need light to germinate.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 14 plants of Stevia. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Stevia in Saint Petersburg, Florida? +

In Saint Petersburg (Zone 10b), start Stevia seeds indoors around Thursday, November 6, 2025 and transplant outdoors around Thursday, January 29, 2026.

What is the last frost date for Saint Petersburg, Florida? +

The average last spring frost date for Saint Petersburg, Florida (ZIP 33708) is around Thursday, January 15, 2026. This is based on NOAA climate normals for USDA Zone 10b.

How long does Stevia take to grow? +

Stevia typically matures in about 90 days from transplanting. In Saint Petersburg, that means you can expect harvest around Thursday, January 29, 2026 plus 90 days.

Should I start Stevia indoors or direct sow in Florida? +

Stevia should be started indoors 10 weeks before your last frost date. In Saint Petersburg, that means starting around Thursday, November 6, 2025.

📚 More Stevia Planting Guides

🗺️

Stevia in Florida

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 10b Stevia Guide

All cities in your zone · Avg dates

→

Other Plants for Saint Petersburg

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Growing Stevia in Zone 10b

Stevia (Stevia rebaudiana) is a popular garden vegetable. In Saint Petersburg, Florida, which is in USDA Hardiness Zone 10b, you should start seeds indoors around Thursday, November 6, 2025.

Your average last frost date is Thursday, January 15, 2026. Plan to transplant your Stevia seedlings outdoors around Thursday, January 29, 2026, about 2 weeks after your last frost date.