Trees are inanimate objects, but have been featured many times in Muppet productions, both as animated and inanimate objects.

Sesame Street

• The Oak Tree appeared in a "Here is Your Life" sketch with Guy Smiley
• A similar version of a tree appeared on "Where Do I Belong"
• The Royal Apple Tree (an altered version of the former)
• Ernie presents the trees of the four seasons.
• In a sketch with Telly and Grover.
• A CGI animated face on a real tree in Season 35(?).
• Cookie Tree
• Gordon tells the story of The Pecan Tree in a storybook.
• A former tree, Log belongs to the Log Bird in the Twin Peaks spoof on Monsterpiece Theater
• Annie Oak is a talking oak tree featured in Elmo's Backyard.

The Muppet Show

• Four realistic-looking trees appear with Link Hogthrob when he sings "I Talk to the Trees" on episode 205. They can't stand the song, so they leaf.
• Miss Piggy sings "Trees" to a tree in episode 401.
• The same tree loses the Marathon Tree-Staring Contest against Klaus Mueller in a "Muppet Sports" sketch in episode 411.

Dinosaurs

• The Spirit of the Tree is featured in the episode "If I Were a Tree".

Christmas Trees

• Alfie the Christmas Tree
• Bruce McSpruce
• Kermit's Christmas Tree
• Mr. Willowby's Christmas Tree

Other

• Sesame Tree
• Spruce Springsteen
• Whispering Log