Firefighters received 999 calls to Broad Acre Farm at Benthall just after 4.30am on Sunday.
Crews from Much Wenlock and Tweedale along with a fire investigation officer went to the scene.
A spokesperson said the blaze involved two cars, a van and about 15 metres of the trees.
The fire was brought under control by 5.20am.
A fire investigation officer was also on scene but it is not yet known how the fire started.