Zinnia Summer Pinwheels are vibrant zinnias that feature striking double blooms with cherry-pink centers and creamy white-tipped petals, offering a dazzling display all season long. With sturdy, branching plants reaching 3–3 1/2 feet, they are a favorite of butterflies and pollinators. These reliable bloomers are perfect for long-lasting bouquets, providing a consistent supply of beautiful flowers throughout the summer. To start outdoors, sow seeds 2–3 inches apart in well-drained soil in full sun after the last frost, covering them lightly with soil. For indoor starts, sow 4 weeks before the last frost, keeping them warm and moist with plenty of light. Thin seedlings to allow for good air circulation and healthy growth. Zinnias thrive in ordinary garden soil, and regular watering ensures a bountiful, mildew-free display.