Paulino Gardens is the ultimate source for plants in Denver. If you know what you're looking for, you're likely to find it. If you don't, you'll still find it! I'm a big fan of their indoor garden area. I was impressed by all their varieties of orchids. Move outside, and you will be overwhelmed by the vastness of their selection. I have never seen so much variety anywhere else. You'll never want to go to a big home-development chain for your plant needs again. Even if it's a bit of a drive for you to get there, it is worth it. Prices are average/high, but again... go there for the selection.