Zinnias are outstanding in beds, borders, and containers, and they have a long bloom season, lasting until frost in the fall. Zinnia plants love sun and heat and only require moderate amounts of water. They are not particular about the type of soil, but do prefer well-drained soil. Their biggest enemy is mildew, so water them with a soaker hose or keep the water at the roots to minimize wetting the foliage. If this isn't possible, water them early in the day, so that the leaves can dry off before nightfall.
In early spring, sow Zinnia seeds indoors using starter trays or small pots. Press the flower seeds into the soil and lightly cover with peat moss or sand. Keep soil slightly moist but not wet until germination occurs. Don't transplant the young Zinnia seedlings too soon. Harden them off for 10 days or so as they are sensitive to cold. Or, after frost season has ended, directly sow Zinnia flower seeds outdoors in a prepared seedbed with loosened, weed free soil. Sow the Zinnia seeds in rows 20 inches apart, spacing seeds every 6 inches. Thin to strongest plant every 18 inches.
Flower Specifications
- Season: Annual
- USDA Zones: 3 - 10
- Height: 36 inches
- Bloom Season: Late spring to early fall
- Bloom Color: Red
- Environment: Full sun
- Soil Type: Well-drained, pH 6.0 - 6.5
- Deer Resistant: Yes
Planting Directions
- Temperature: 75F
- Average Germ Time: 7 - 14 days
- Light Required: No
- Depth: Cover seed lightly with peat moss
- Sowing Rate: 2 - 4 seeds per plant
- Moisture: Keep soil slightly moist but not wet until germination
- Plant Spacing: 18 - 20 inches
