Growing Guide • Zinnias
Zinnias (Zinnia elegans) are a vibrant, easy-to-grow flower that adds bold color to any garden. Known for their long-lasting blooms, they’re a favorite for cut flower arrangements and bouquets. Zinnias thrive in warm weather and produce an abundance of blossoms from mid-summer through fall, making them perfect for continuous cutting and enjoying indoors. With their wide range of colors and ability to attract pollinators, zinnias are not only beautiful but also a great addition to any pollinator-friendly garden. Ideal for beginner and seasoned gardeners alike, they offer endless possibilities for floral design and decoration.
Lifecycle
Annual
Planting Season
Direct Sow, Early Spring
Planting Depth
1/4 inch
Germination
5-7 Days
Water Needs
Average
Light Needs
Full Sun
Time to Bloom
60 to 70 days
Harvest Season
Summer through Fall
-
n Zone 5, zinnias can be directly sown outdoors once the danger of frost has passed, typically in late May. Prepare the soil by loosening it to a depth of about 8 inches and removing any weeds or debris. Sow the seeds about ¼ inch deep into the soil and lightly cover them. Space seeds 6-12 inches apart, depending on the variety, to give each plant room to grow. Water the area gently to keep the soil consistently moist until germination occurs, which typically takes 5-7 days. As the seedlings grow, thin them to allow for proper airflow and prevent overcrowding. With warm temperatures and full sun, zinnias will thrive, producing vibrant blooms throughout the summer months.
-
To harvest zinnias (Zinnia elegans), wait until the flowers are fully open and the petals are vibrant and firm. Using sharp, clean scissors or pruning shears, cut the stems about 6-8 inches from the base of the flower. It’s best to harvest in the morning when the flowers are fully hydrated, as this helps them stay fresh longer. Remove any leaves or foliage from the stems to prevent them from rotting in the vase. If you’re drying zinnias for arrangements, hang the stems upside down in a dry, well-ventilated area away from direct sunlight. Proper harvesting ensures you enjoy beautiful, long-lasting blooms both fresh and dried.