Growing swiss chard here for the first time. It is definitely behind the bok choy. I figure it just doesn't like the weather enough yet. In the greens bed, the bok choy is doing the best, followed by lettuce then kholrabi and then swiss chard. Worst of all is the lacinato kale, but that's just because it didn't bother sprouting - year old seeds though.seeds might be old. swiss chard likes humidity so water them from above or spray them with water. I had the same situation a few years ago. when the first chards matured I got the seeds and next time I planted them I had plenty of huge, nice looking plants.