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How to Grow Petunia

Petunia (Petunia × hybrida)

Ready to grow Petunia?

Order seeds from trusted suppliers.

🛒 Amazon 🌿 True Leaf

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🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🌍 Flower Garden Soil ✂️ Pruning Shears 🧤 Garden Gloves 🚿 Watering Can

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Find Your Petunia Planting Dates

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🌿 Plant Overview

Scientific Name Petunia × hybrida
Category flower
Type Annual
Days to Maturity 75 days
Starting Method Start Indoors

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate (1 inch/week)

↔️

Spacing

12" apart

🌱

Depth

0.13" deep

📏

Height

6-18"

🌱

Germination

7-14 days

Ready to Grow Petunia?

Find quality seeds from trusted suppliers.

🛒 Buy on Amazon 🌿 True Leaf Market

* Affiliate links — we may earn a small commission at no extra cost to you.

🤝 Good Companions

TomatoBasilMarigold

⚠️ Avoid Planting Near

Fennel

Petunia Planting Calendar by Zone

Zone 1a Zone 1b Zone 2a Zone 2b Zone 3a Zone 3b Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b Zone 8a Zone 8b Zone 9a Zone 9b Zone 10a Zone 10b Zone 11a Zone 11b Zone 12a Zone 12b Zone 13a

Petunia Planting Calendar by State

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Frequently Asked Questions

When should I plant Petunia? +

Start Petunia seeds indoors 10 weeks before your last frost date, then transplant outdoors 2 weeks after the last frost. Use the search on this page to find exact dates for your ZIP code or city.

How long does Petunia take to grow? +

Petunia typically matures in about 75 days from planting. Exact timing varies by variety, soil conditions, and local climate.

Should I start Petunia indoors or direct sow? +

Petunia should be started indoors 10 weeks before the last frost date. This gives seedlings time to establish before being transplanted outside after frost danger has passed.

How much sun does Petunia need? +

Petunia requires full sun (6-8 hours) to thrive.

How far apart should I plant Petunia? +

Space Petunia plants 12 inches apart to allow adequate airflow and root development.

How much water does Petunia need? +

Petunia has moderate (1 inch/week) water needs. Consistent moisture is important especially during germination and early growth.

About Petunia

Prolific bloomer in every color of the rainbow. Ideal for containers, hanging baskets, and window boxes. Deadhead regularly for continuous blooms.

Expect your Petunia to be ready for harvest in approximately 75 days from planting.

Use the search above or browse by zone or state to find the perfect planting dates for your location.