9/13/2023 0 Comments Planting zinnia seeds indoorsZinnias can be prone to diseases like leaf spot diseases or powdery mildew. The “petals” are called ray flowers and the center portion of the flower is filled with disk flowers. This means that what you see as the flower head is actually multiple small flowers. Some zinnia varieties are single-petaled (meaning they have one row of petals) and others will be double or multi-petaled.īecause they are members of the Asteraceae family, their flower is actually a composite flower. Flowers can be as small as an inch in diameter to 5 inches, depending on the variety. Zinnias produce bright, cheerful blooms in almost every color but blue. They prefer full sun (6 to 8+ hours of direct sunlight per day) and well-draining soil. They will flower and set seed within one year or season of growth. This means they produce non-woody growth (for the most part). Plants of the Zinnia genus are considered herbaceous annuals. About Zinnias This beautiful flower can be grown in nearly any color. If you live in a hot, humid climate, you may consider spacing your zinnias further apart to increase air circulation through the plants, and this will reduce disease incidence as well. Smaller zinnia varieties used as a border plant or in pots could be planted as close as 6 inches apart, while larger giant-flowered varieties may need up to 18 inches of space between each plant. Spacing depends on what variety you are planting and what your purpose is for your zinnias. How far apart should I space zinnias when planting?
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