Zinnia ‘Sombrero' is an old variety that has bold, bi-colored petals. The inner half of the petals are red while the outer half are bright yellow.. Zinnias are easy to grow and bloom quickly to fill your garden or patio with colour all summer. They keep blooming all through a hot season and make wonderful cut flowers. They are excellent for pollinator plantings and are especially attractive to butterflies. Annual Plant in: Full Sun. Flowers In: Summer-Autumn. 200 seeds