Cosmos Bipinnatus Sensation Mix is one of the simplest cut flowers for a beginner to grow. They grow from seed up to a 5 ft plant in 90 days or less. Cosmos grow wherever the sun shines. They prefer a sandy soil, so don't fertilize these fellas! Too many nutrients will lead to a leafy plant without blooms. Seeds get planted 1/4" deep after all threat of frost has passed. Cosmos are supreme sun lovers. Their delicate petals will grace your cutting garden all summer long. As long as you are diligent with your dead heading! 100 seeds per packet.