When to Plant Stevia in Loma Mar, California (94021)

Location

Loma Mar, California

ZIP Code

94021

USDA Zone

Last Frost

Tuesday, February 10, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Tuesday, December 2, 2025

Transplant Outdoors

Tuesday, February 24, 2026

Based on last frost Tuesday, February 10, 2026 · Zone 9b

Pro tip: Start Stevia seeds indoors 10 weeks before your last frost date, then transplant outdoors around Tuesday, February 24, 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 Loma Mar?

Get your seeds now so they're ready by Tuesday, December 2, 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 Loma Mar, California? +

In Loma Mar (Zone 9b), start Stevia seeds indoors around Tuesday, December 2, 2025 and transplant outdoors around Tuesday, February 24, 2026.

What is the last frost date for Loma Mar, California? +

The average last spring frost date for Loma Mar, California (ZIP 94021) is around Tuesday, February 10, 2026. This is based on NOAA climate normals for USDA Zone 9b.

How long does Stevia take to grow? +

Stevia typically matures in about 90 days from transplanting. In Loma Mar, that means you can expect harvest around Tuesday, February 24, 2026 plus 90 days.

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

Stevia should be started indoors 10 weeks before your last frost date. In Loma Mar, that means starting around Tuesday, December 2, 2025.

📚 More Stevia Planting Guides

🗺️

Stevia in California

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 9b Stevia Guide

All cities in your zone · Avg dates

→

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Growing Stevia in Zone 9b

Stevia (Stevia rebaudiana) is a popular garden vegetable. In Loma Mar, California, which is in USDA Hardiness Zone 9b, you should start seeds indoors around Tuesday, December 2, 2025.

Your average last frost date is Tuesday, February 10, 2026. Plan to transplant your Stevia seedlings outdoors around Tuesday, February 24, 2026, about 2 weeks after your last frost date.