Almost all seeds I directly planted in the garden mid May in Ontario came up. Rabbits gots some after sprouting but I'll forgive them. Many of mine grew to be 6-7+ feet tall, possibly because they were competing for height as I planted them relatively close together. Huge number of blooms on each plant, nice and sturdy stems. Some flowers with peddles of pure yellow, some with the rust/orange inner ring.
Photo is from the end of July, many more flowers after that. The tall one in the middle facing the other direction is a Mongolian Giant.....11+ feet tall, only one flower head as expected.
It was my first time seeding cosmos and I was worried that without pinching I may not have a lot of flowers. But it bloomed beautifylly in large numbers. I will buy again and this time I will pinch half of the seedlings.
Disappointed. Garden over-run with invasive toadflax and opium poppies. Will have to start again with something else.