Petunia Growing Guide
Solanaceae family
Days to Harvest60 days
SunlightFull Sun
Frost ToleranceNone
Spacing10/sqft
Germination7-14 days
HardinessTender
Germ. Temp75°F
Start Indoors10 weeks before last frost
Growth Stages
- Seedling
- Establishing
- Budding
- Blooming
Planting Dates by Zone
| Zone | Start Indoors | Transplant | Direct Sow | Harvest |
|---|---|---|---|---|
| Zone 1a | Mar 16 | Jun 1 | — | Jul 16 |
| Zone 1b | Mar 16 | Jun 1 | — | Jul 16 |
| Zone 2a | Mar 6 | May 22 | — | Jul 6 |
| Zone 2b | Mar 16 | Jun 1 | — | Jul 16 |
| Zone 3a | Mar 13 | May 29 | — | Jul 13 |
| Zone 3b | Mar 6 | May 22 | — | Jul 6 |
| Zone 4a | Feb 24 | May 12 | — | Jun 26 |
| Zone 4b | Feb 20 | May 8 | — | Jun 22 |
| Zone 5a | Feb 17 | May 5 | — | Jun 19 |
| Zone 5b | Feb 17 | May 5 | — | Jun 19 |
| Zone 6a | Feb 17 | May 5 | — | Jun 19 |
| Zone 6b | Feb 4 | Apr 22 | — | Jun 6 |
| Zone 7a | Feb 4 | Apr 22 | — | Jun 6 |
| Zone 7b | Jan 30 | Apr 17 | — | Jun 1 |
| Zone 8a | Jan 25 | Apr 12 | — | May 27 |
| Zone 8b | Jan 11 | Mar 29 | — | May 13 |
| Zone 9a | Jan 9 | Mar 27 | — | May 11 |
| Zone 9b | Dec 30 | Mar 17 | — | May 1 |
| Zone 10a | Dec 12 | Feb 27 | — | Apr 13 |
| Zone 10b | Nov 19 | Feb 4 | — | Mar 21 |
| Zone 11a | Nov 19 | Feb 4 | — | Mar 21 |
| Zone 11b | Nov 6 | Jan 22 | — | Mar 8 |
| Zone 12a | Oct 23 | Jan 8 | — | Feb 22 |
| Zone 12b | Oct 23 | Jan 8 | — | Feb 22 |
| Zone 13a | Oct 23 | Jan 8 | — | Feb 22 |
| Zone 13b | Oct 23 | Jan 8 | — | Feb 22 |
Frequently Asked Questions
How long does it take to grow Petunia?
Petunia takes approximately 60 days from planting to harvest.
How much sun does Petunia need?
Petunia requires full sun (6+ hours direct sunlight per day).
How far apart should I plant Petunia?
Plant Petunia at 10/sqft using square foot gardening spacing.
Can Petunia survive frost?
Petunia is frost-sensitive and should not be exposed to frost.
How long does Petunia take to germinate?
Petunia seeds germinate in 7-14 days at an optimal temperature of 75°F.
When should I start Petunia seeds indoors?
Start Petunia seeds indoors 10 weeks before your last frost date, then transplant 1 week after last frost.
Plan Your Petunia Garden
Track Petunia from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
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