I think the Blue Dream at the Treehouse is one of the best tasting plants ever. Assuming it is the one I'm thinking of (MG Canna's) it tastes to me like a bowl of Fruit Loops. Most Excellent!
I can vouch for the Blue Dream at The Releaf Center (Highlands area), picked some up on 4/20 for $150/oz and it is definitely top shelf with a nice cure and trich coverage
I cant attest for any flower at evergreen I can say they have some very nice concentrates. I got a gram my first visit for under 20$ the super lemon haze wax I got is prob some of the best I have smoked to date.
If you still hunting for some blue dream...i dont have any beans but i can get you a cut i believe i have some rooted atm...also have a plant in flush now if u wanna see finished product