I have never grown one because they get too big for my conditions, but know people that have them. Estimating age and maturity are difficult to estimate because there are so many variables involved with growth and how long to get to blooming size. Yes, they can take many years to get to blooming size, but depends on if the plant likes the conditions or not. Plants will grow faster under optimal conditions. As far as size, they can get leaves as long as 6 feet. They do tend to like brighter light and many growers do mount them, but depends on your particular conditions.

Susan