I bought a 2 inch tall H. minor with mature pitchers about 6 months ago. It's still about the same size. Do they grow bigger? I've seen a product profile at one of the c.p. stores say they can grow to 4 inches, but I'd like to get some confirmation. If it grows bigger, I might need to move it somewhere else, but if it stays the same I'm just going to keep it where it is.