A week after they survived? I would start very mild, even feeding every other water for a couple weeks then return to normal. Off subject......I've always wondered, what are the little round things at the top of the big pots. I always see them, never used them, and would think I'd know what it was, but nope....... Do they do anything in particular? I have some soil-borne pests, and was wondering if that stuff would help.