The Q&A Archives: Petunias From Seed

Question: I planted petunia seeds in potting soil in my greenhouse. They did not come up. I watered the pot when I planted the seed and then again with a spray bottle about once a week. The temperature was about 65 at night and 80 to 85 during the day. Not even one seed came up. What did I do wrong?

Answer: You may need to change your technique just a bit - Petunia seeds should germinate in 10-21 days at 70F to 75F degrees. The seeds need light to germinate, and constant moisture. Try this: use moistened seed starting mix in your trays or pots. Sow seeds on top of the soil and barely press them in with your hand. Don't cover them with more mix. Place plastic wrap over the trays or pots to help keep moisture in. When the seeds sprout, remove the plastic. Water as needed, by placing the pots or trays into a basin of water, or by gently irrigating the soil. A spray bottle isn't the best way to apply water; it's more suited to supplying humidity on or around plants. Try again - I'll bet you'll be successful if you follow the above guidelines.

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