Petunia

70d to harvest

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.

Crop Dates

Milestone	Date
Start Indoors	Feb 9th
Last Frost	Apr 20th
Transplant / Sow Outdoors	Apr 6th
Harvest Begins	Jun 15th
Harvest Ends	Oct 20th

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

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.