These 10cm wide flowers are semi-double to fully double and have flat petals.H80-100cm. 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