This was on the list of things to do in Portland. I visited it under less than ideal conditions - very cold temperatures on a December day. In fact, they did not open until noon to allow the ice to melt naturally. I had a lovely guided tour of the garden. I can imagine that it is quite beautiful in the spring/summer/fall. I would allow about 1.5 hours to visit (if you take the tour). I thought the entrance fee was a little steep at $9.50 per adult. But I think they rely on ticket sales for funding, so it's reasonable.