Blue tree

Blue tree may refer to:

• Blue Tree, a New York City boutique owned by actress Phoebe Cates
• Bluetree, a Northern-Irish Christian band
• The Blue Trees, a 2000 album by Welsh band Gorky's Zygotic Mynci
• The Blue Trees (Dimopoulos), a performance and installation artwork by Konstantin Dimopoulos

• Blue ash Fraxinus quadrangulata, a type of tree
• Blue spruce Picea pungens, a type of tree
• Aoki (surname), a Japanese surname meaning "blue tree"