You should plant zinnia seeds ¼ to ½ inch deep in the soil
. After planting, expect seedlings to sprout in roughly 4 to 7 days
. Additional information for planting zinnia seeds:
- Zinnias grow in almost all zones as long as you plant them after the last frost and the soil is warm (ideally 70°F)
. You can start zinnia seeds indoors earlier if you want to get a head start on the season
- To prepare the soil, clear any debris, then mix in compost or natural raised bed soil. Zinnia plants aren't too particular about soil conditions so long as they get enough sun
- Keep the soil moist, watering at the base of the plant
- You can either sow seeds directly or scatter them. Seed packets typically recommend spacing seeds about 6 inches apart, with rows at least 12 inches apart to allow for proper airflow
- Zinnias usually take about 2 months from seed to flower, though this can vary based on weather and climate
