Petunia Seeds,
Copper Spotted

Start seeds indoors 8-10 weeks before the last frost date in your region. Once all danger of frost has passed and temperatures are consistently above 50 F, transplant seedlings outdoors. If you’re unsure of your last frost date, consult our blog post ‘Our Experts Answer Questions, Share Resources.’

Gently press the seeds into the soil. Do not cover them, as they need light to germinate. Maintain a soil temperature of 70-85 F for the best germination results. To retain moisture, you can cover the seed tray with plastic wrap or a humidity dome. Germination typically takes 7-14 days. Gradually harden off the plants over 7-10 days before moving them outdoors.

Transplant petunias 6-8 inches apart in a location with full sun and well-draining soil. Regular watering is essential, but avoid overwatering, as soggy soil can lead to root rot. Applying a thin layer of mulch helps retain moisture and prevent weeds. To encourage bushier, more compact growth, pinch back young plants by trimming the tips of new growth. Removing faded flowers will keep the plants blooming vigorously.

• Petunias will readily self-seed in mild winter climates.
• To save seed, hand-pick the brown seed pods.
• Take care to collect the seed pods before they burst and spread the seeds across the garden.
• Store the seeds over winter in a cool, dark, dry place.