Where are Spicy Mushrooms?

It takes quite some time before I see plants spawning anywhere in the world. I sent my main Sim to Bramblewood every day for a week, and never found anything to forage. I usually had her fish for a full day then return the following day and again spend the day fishing or chatting up the locals. I saw plenty of dirt mounds but no plants. I finally cheated a bit and bought one in B/B. I'd rather not do that, but desperate times means you do what you have to do to get things done. :)