Petunias need light and consistently warm soil for germination, though once they’ve sprouted you can grow them up in cooler temperatures. You can direct sow into your garden if you have consistently warm spring temperatures, especially in southern areas where petunias are often grown as a perennial. Most gardeners in most zones will see the best results when using seed starting trays, enabling you to get a jump on the growing season and adequately monitor soil temperature, as well as allowing you to water those delicate seeds from the bottom, rather than the top. Our Hydrofarm Germination Station provides thermostatically controlled heat and a humidity dome, as well as a 72-cell reusable seedling tray. Just follow the directions, gently, yet firmly, press the petunia seeds into your growing medium and do not cover with soil. If watering from the top, use a mister so as not to dislodge the seeds while they are putting down roots. At consistent soil temperatures of 72 to 77°F, petunias will normally germinate in 7 to 12 days.
Mature Height: 8-10 inches Mature Spread: 15-18 inches Exposure: Full Sun - Light Shade Bloom Time: Spring - Fall Soil Moisture: Average, Well DrainedSoil Type: Widely AdaptableAnnual in Zones: 1-7 Perennial in Zones: 8-11 What is my zone?
We also carry a variety of Petunia Plants in individual 3” pots.