Petunia

Family: Solanaceae Garden Petunia

Planting Schedule

Provide your location or planting zone to unlock dates and add Petunia to a garden.

Velvety, trumpet-shaped blooms spill in a cascading ribbon, opening to a velour-like glow that feels almost luminous against the foliage.

Petunia ‘Petunia’ (trailing/spreading) delivers a long, showy season of color with a soft, slightly ruffled texture and a dependable, ground-hugging habit that makes every bed and container look lavish. Ideal for bedding displays and hanging baskets where its trailing drape can be admired at every angle.

Light: Full SunMaturity: 70 DaysHabit: Spreading

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Petunia Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Mar 16th	May 11th	Jul 20th – Aug 29th
Zone 2b	Mar 6th	May 1st	Jul 10th – Aug 25th
Zone 3a	Mar 6th	May 1st	Jul 10th – Sep 1st
Zone 3b	Mar 10th	May 5th	Jul 14th – Sep 21st
Zone 4a	Mar 6th	May 1st	Jul 10th – Sep 24th
Zone 4b	Mar 4th	Apr 29th	Jul 8th – Sep 27th
Zone 5a	Feb 27th	Apr 24th	Jul 3rd – Sep 30th
Zone 5b	Feb 23rd	Apr 20th	Jun 29th – Oct 5th
Zone 6a	Feb 20th	Apr 17th	Jun 26th – Oct 10th
Zone 6b	Feb 14th	Apr 11th	Jun 20th – Oct 16th
Zone 7a	Feb 9th	Apr 6th	Jun 15th – Oct 20th
Zone 7b	Jan 30th	Mar 27th	Jun 5th – Oct 28th
Zone 8a	Jan 21st	Mar 18th	May 27th – Nov 5th
Zone 8b	Jan 12th	Mar 9th	May 18th – Nov 12th
Zone 9a	Dec 26th	Feb 20th	May 1st – Nov 26th
Zone 9b	Dec 1st	Jan 26th	Apr 6th – Dec 9th
Zone 10a	Continuous Production
Zone 10b	Continuous Production
Zone 11a	Continuous Production
Zone 11b	Continuous Production
Zone 12a	Continuous Production
Zone 12b	Continuous Production
Zone 13a	Continuous Production
Zone 13b	Continuous Production

Crop Details

Trait	Value
Days to Maturity	70
Sun Requirements	Full Sun
Growth Habit	Spreading
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	70
Min Soil Temp (°F)	50
Min Night Temp (°F)	50
Harden Off (days)	7

Culinary Notes

Chef's Note

Despite being marked edible, petunia is typically grown as an ornamental and its petals aren’t known for consistent, robust flavor—think more visual lift than reliable eating. If you use it at all, keep it as a careful, pesticide-free garnish and pair with bright, clean flavors like lemon and mint so the bloom’s subtlety doesn’t get swallowed.

Best Uses

Use only as a rare garnish if you know the blooms are grown for edibility and are pesticide-free
Confetti-like petal scatter on cold plates (best with very light dressing)
Infuse cautiously in syrups or vinegars only in tiny test batches

Flavor Profile

Usually not cultivated for food flavor Aromatic but not reliably palatable Texture of petals is delicate and can get watery

Kitchen Pairings

lemon zest honey mint plain yogurt sparkling wine (or champagne)

Frequently Asked Questions

What pest or disease most commonly affects Petunia (Petunia × atkinsiana), and how can I treat it?

Petunias (Solanaceae) are especially prone to powdery mildew and botrytis in humid, crowded plantings. Improve airflow by spacing plants and removing affected leaves, then spray with a labeled fungicide for powdery mildew/botrytis and water at the soil line rather than overhead. If you see gray mold/botrytis, remove the worst blooms and discard them to prevent spread.

How often should I water Petunia during active growth, and what soil moisture level should I aim for?

During the main growth phase (after plants are established and actively blooming), water when the top 1 inch of soil feels dry, then water thoroughly until excess drains. Petunias do best with consistently moist (not soggy) soil—wet soil can trigger root problems and botrytis. In hot weather or containers, this may mean daily checks, because the surface can dry quickly.

How do I know when Petunia is ready to harvest?

Petunia is typically harvested as flowers rather than a mature “crop” at 70 days; start harvesting when individual blooms are fully colored and open. For best continued blooming, deadhead spent flowers daily or every few days by pinching/cutting just above the next healthy set of leaves. Stop harvesting/maintaining deadheads only when you’re ready for the plants to decline, since regular deadheading keeps new buds forming.