Couple north CO places....
I frequent Solace Meds on the south end of Ft. Collins and like the store. Friendly staff and good selection. I pretty much stick to wax so can't say how the flower prices are, but I'm sure they'd be in line with other stores in the area.
If you want to check out an interesting head shop also in Ft. Collins, Kind Creations carries mostly hand made glass and has some really neat and unique pieces. Very, VERY pricy but a fun place to look around and window shop.
Free place to hang out, hike a little and enjoy the buzz....Chapungu Sculpture park near Loveland. 1-2 miles of trail winding around a little wetaland area park decorated with stone sculputres from Africa.
http://www.colorado.com/art-museums/chapungu-sculpture-park-centerra