Flowers · tender annual

Petunia from seed

Petunia × hybrida · also searched as petunias

Germination temperature: 72 to 77°F (22 to 25°C)
Sowing depth: surface
Days to germinate: 6 to 10 days
Light: Needs light: press onto the surface
Before sowing: Nothing needed
Start indoors: 8 to 10 weeks before planting out
Plant out: 1 to 2 weeks after the last frost

Your dates from your last frost Seed not coming up?

Sowing

Dust-fine seed. Surface-sow 8 to 10 weeks before planting out (Iowa State) at 72 to 77°F (Johnny's) and keep the surface moist; direct sowing is not recommended.

Care and transplanting

Feed lightly once true leaves show and pinch for branching. Harden off thoroughly.

Problems

Seed buried even slightly may not come up. Seedlings damp off easily, so water from below.

Saving seed

Hybrid petunias are not reliable from saved seed.