It's not been especially economical the first year. I've probably put in nearly as much on the pots / compost / seeds as the value of the crop I'm getting off them. I haven't used any feed, other than topping up with fresh compost as the level settles. I might try letting a couple of the pods get ripe, and then save the seeds over the winter. And next year I might go with a half soil / half compost mix. That should make them much cheaper than just popping down to Sainsbury's.