Just wanted to add that in my game this location was not where the toxic version was at all. I'm not sure how the spawners work but they do seem to change from game to game. I had over 100 (99+) of the Chamomile and it took me forever to finally find the Toxic Chamomile plant that was down by the fishing spot to the left of Forest Hideaway, next to a single lamp post. I'm pretty sure this was the only Toxic Chamomile plant in the entire world as I had crawled around every other plant/site looking for it.