'Envy' zinnias are asked for by our customers every year. The flowers are a chartreuse green which may sound strange, but trust me, this makes all the other colors of your cut flower bouquets just pop! 36-40" tall. Direct sow in the garden after the danger of frost is past or start ahead of time to get a jump on the season. Zinnias are truly a warm season annual. They are the top annual in my garden for butterflies and pollinators.