Petunia Planting Guide

June

petunia this June — what to know

Everything below applies to petunia broadly. For a plan that's dialled into your county's frost dates and soil, tap your location.

Sun full sun

Water moderate

Days to harvest 70–90

Spacing 12″

How to water petunia
Consistent moisture matters more than volume for petunia. Little and often beats occasional drenching.
Where to put petunia
South-facing beds are ideal for petunia. Shade from nearby trees or fences costs real production.
Check your local forecast before planting
Your zone determines the exact week to plant petunia. Pick your county below and we'll line everything up against your frost dates.

Find your zone's petunia schedule →

Petunias (Petunia x hybrida) are warm-season tender annuals prized for their prolific, trumpet-shaped blooms in nearly every color. They perform from hanging baskets to garden borders and bloom continuously from late spring until frost, provided spent flowers are removed regularly.

Petunia x hybrida · Flower · Solanaceae family · 70–90 days to maturity

Annual Blooms in Summer Pollinator-friendly Fragrant

Why it matters: If you're just starting a flower garden in your area, Petunia is a forgiving first pick. It tolerates imperfect soil, mild drought, and the occasional missed watering. The reward: weeks (sometimes months) of continuous color.

Get Your Personalized Petunia Planting Dates

Enter your ZIP code to see exact planting dates, soil compatibility, and growing tips specific to your county.

Where Can You Grow Petunia?

Zone Compatibility for Petunia Zones 2a – 11b

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

Ideal (data available) Suitable Marginal Not recommended

Planting Dates by Zone

Zone	Start Indoors	Direct Sow	Transplant	Bloom
Zone 2a	Mar 21	—	Jun 13	Sep 5 – Oct 3
Zone 2b	Mar 13	—	Jun 5	Aug 28 – Oct 2
Zone 3a	Mar 13	—	May 29	Aug 14 – Oct 2
Zone 3b	Mar 8	—	May 24	Aug 9 – Oct 4
Zone 4a	Mar 4	—	May 20	Aug 5 – Oct 7
Zone 4b	Feb 27	—	May 8	Jul 17 – Oct 2
Zone 5a	Feb 28	—	May 2	Jul 11 – Oct 3
Zone 5b	Feb 21	—	Apr 25	Jul 4 – Oct 3
Zone 6a	Feb 13	—	Apr 17	Jun 26 – Oct 2
Zone 6b	Feb 6	—	Apr 10	Jun 19 – Oct 2
Zone 7a	Jan 28	—	Apr 1	Jun 10 – Sep 30
Zone 7b	Jan 21	—	Mar 18	May 27 – Sep 23
Zone 8a	Jan 11	—	Mar 8	May 17 – Sep 20
Zone 8b	Dec 31	—	Feb 18	Apr 29 – Sep 16
Zone 9a	Dec 16	—	Jan 27	Apr 7 – Sep 8
Zone 9b	Nov 30	—	Jan 4	Mar 15 – Aug 30
Zone 10a	Nov 6	—	Dec 4	Feb 12 – Aug 13
Zone 10b	Nov 6	—	Nov 20	Jan 29 – Aug 13
Zone 11a	Nov 6	—	Nov 6	Jan 15 – Aug 13
Zone 11b	Nov 6	—	Oct 30	Jan 8 – Aug 20

Why are some columns showing "—"?

Direct Sow shows "—" because Petunia benefits from being started indoors first, then transplanted after the last frost.

How to Plant Petunia

12"

Between Plants

12"

Between Rows

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

Moderate — regular watering

Water when the top inch of soil feels dry. Consistent moisture produces the best results.

🧪 Soil pH

6 – 7

Prefers neutral to slightly acidic soil — ideal for most garden beds.

🗺️ Hardiness Zones

Zone 2a – 11b

📅 Days to Maturity

70–90 days

Medium-season crop. Start early for best results in shorter seasons.

👪 Plant Family

Solanaceae

Rotate with other families yearly to prevent soil-borne diseases. Don't plant in the same spot where Solanaceae family crops grew last year.

Succession Planting Petunia

Petunia matures in just 70–90 days, making it ideal for succession planting. In a typical 180-day growing season, you can get up to 2 successive plantings by sowing every 8 weeks.

Your actual succession count depends on your local frost dates. Enter your ZIP code to get personalized succession planting dates for your area.

Companion Planting for Petunia

✅ Good Companions

Basil Tomatoes Peppers Squash

Check more combinations with our Companion Planting Checker →

Growing Tips for Petunia

Start seeds indoors 8–10 weeks before last frost; seeds need light to germinate — press onto moist mix surface, do not cover. Transplant after last frost once nights stay above 50°F. Pinch back leggy plants mid-summer to encourage bushy re-bloom. Wave/spreading types tolerate light shade but bloom less. Feed every 2 weeks with balanced fertilizer once established.

Saving Petunia Seeds

Recommended for Your Garden

🌱

Seed Starting Trays $8-20

Start seeds indoors with reusable cell trays and humidity domes.

🧪

Soil Test Kit $12-25

Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.

🏷️

Garden Plant Markers $6-12

Keep your garden organized with durable, weather-resistant plant labels.

Reader favourite

Seed Saving & Storage Guide

$27 $157 value

Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.

200 plants, step-by-step: life cycle, pollination type, isolation
Exact temperature + humidity ranges that keep seeds viable
Bonus: searchable Google Sheets tracker + custom GPT assistant

Save a lifetime of seed money →

Petunia by State

Frequently Asked Questions

How long does it take to grow Petunia?

Petunia (Petunia x hybrida) takes 70 to 90 days from planting to harvest. Exact timing depends on your variety, growing conditions, and USDA zone.

What zones can Petunia grow in?

Petunia can be grown in USDA zones 2a through 11b. Use the planting calendar above to find the exact dates for your zone.

How much sun does Petunia need?

Growing Petunia requires Full Sun (6-8+ hours), Moderate — regular watering, and soil pH of 6 to 7.