Crazy For Cosmos Mix Cosmos Flowers feature a dazzling array of 10 colorful and fascinating cosmos varieties that is sure to provide a symphony of color throughout the season. Suitable for all regions of North America. Easy-to-grow favorite. Single flowers, 3 to 4 inches across, in yellow, orange, lavender, pink, magenta and white. Grows to a height of 45 to 54 inches. Blooms in about 100 days. Germination rate about 80% or better. David’s Garden Seeds is a Veteran owned business that has been offering quality seeds since 2009.