He branched out from the bedroom.

A naked creep was arrested for allegedly kissing, caressing and having passionate “sex” with a tree at a popular public park in England — grossing out onlookers and baffling police.

The nature freak was caught on camera peeling off his clothes and rubbing passionately against the stump of a conifer in Wiltshire’s Queen Elizabeth Gardens on Tuesday afternoon, cops and witnesses told walesonline.co.uk.

“I was just walking in the park with one of my mates and we saw a man hugging a tree and thought it was interesting. We walked closer and as we did, we saw his trousers down,” said a witness, who shot footage of the incident.

“I started recording and he just started taking off all his clothes and kissing the tree. After I stopped recording, the police turned up and started following the man around then arrested him.’’

Roughly 25 people were cooling off in the greenspace during the unidentified 40-something’s bizarre attempt to become one with mother nature — prompting calls to cops.

Police said the leaf-loving perv was busted on suspicion of indecent exposure.

“Officers were called to Queen Elizabeth Gardens shortly after 4:30 p.m. following several reports from members of the public regarding a naked man,” a spokesman for the Wiltshire Police said. “He was taken to custody and has been released on bail while enquiries are ongoing.”

The odd outdoor incident came the same day an award-winning Penn State professor was charged with allegedly committing sexual acts with his dog on a state forest trail.

Themis Matsoukas, 64, was allegedly caught in footage naked from the waist down performing the vile sex acts on his collie near bathrooms at Rothrock State Forest in Pennsylvania, according to reports.