I grew out two batches of this plant from seed last season. My first attempts completely failed, I don't think I had a single seed germinate.
I purchased some additional seeds, did additional research (Growing them with a humidity dome on top of the fridge for two weeks seemed to be the trick) and was able to have a large successful crop the next go around. For me they were slow to germinate, but once I provided a warm and extra humid location they seemed to do alright.
The plants grew healthy and big throughout the season dying back with the first hard frost of the season.