I have been to Fort Collins Nursery many, many times - I return because of the great deals, wide selection, and ...well ... because it's just a nice place to walk around in!
While I have not purchased trees there, their selection of shrubs, small fruits, and perennials is wonderful! I have found plants there that I have not been able to locate elsewhere (check out their Hosta area, for example). Every perennial that I have purchased there has thrived over the years. The play area is centrally located and a delight to kids & parents alike. As with all the nurseries in town, staff is very knowledgeable and willing to help. The gift area also carries some very unique items for the person 'who has everything'. Stop buy and wander around ... I promise that you will get some ideas and will probably walk away with a plant or two (whether you planned on it or not!)