What's the longest it has taken for shrooms to kick in?

[DiLoS]

I have "heard" that anything less than 2gs really dont let the visuals kick in, but you get the ultimate body buzz

Shrooms that I got in the summer gave me visulizations off of 2 gs. I could see patterns spinning on my ceiling and walls, the people in my posters were moving around, and the room would go convex and concave. Pretty good shrooms for $10 (canadian) for 2 grams of them.