I've never grown swift so its hard to compare, it was a toss up between swift and rocket this year and the cencus was rocket so maybe I was lucky but those growing out of the ground must keep them well watered and try to be patient, I've got them in and out and I've noticed how dry the out of the soil do get. I dug out four plants of rocket today and there are some small ones but they all go down the same hole. ;D ;D ;D