Petunia Flower Seeds

Petunia Flower Seeds

13 varieties

13 products

Learn how to plant

How to Plant Petunia Flower Seeds

Fast Facts

Planting season
Spring
Life cycle
Annual
Sowing method
Start Indoors
Seed prep
Requires Light
Light
Full Sun
Water needs
Average
Planting depth
0 inches, 1/8 inch
Spacing
Varies by variety
Mature height
Varies by variety
Hardiness zones
1 to 10
Bloom season
Spring through Late Summer, Summer through Fall
Days to maturity
70 to 85 Days

Ranges cover every variety in this group. Check the product page for the exact figures.

About Petunia Flower Seeds

Petunia Flower Seeds grow in full sun positions. Flowering runs spring through late summer or summer through fall. Harvest begins around 70 to 85 days from sowing. The figures below are the ones on the packets in this group; each product page carries the exact numbers for that variety.

When to plant

Plant in spring. Start seed indoors and move the seedlings out once the danger of frost has passed. Hardy in zones 1 to 10 — your local frost dates decide the exact week.

Where to plant

Choose a site in full sun. Water needs are average once the plants are established. Free-draining soil matters more than rich soil; seed sown into ground that stays wet rots before it germinates.

How to plant

Sow 0 inches or 1/8 inch deep. This seed needs light to germinate, so press it onto the surface and firm it in rather than burying it. Water gently to settle the soil, then keep the surface evenly moist until seedlings or shoots appear. Indoor starts do best in warmth and bright light; harden the seedlings off over a week before planting out.

How to care

Keep watering average, at the base of the plant rather than over the leaves. Grown as an annual, so plan to sow again next season. Flowers appear spring through late summer or summer through fall; cutting or deadheading regularly keeps more coming. Expect to start harvesting around 70 to 85 days after sowing.

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