FROST

As a newbie I worry alot... about numerous things, but at the moment it's frost.
I have new fruit bushes and a fig tree that I'm wondering if I should have protected against the -6 degC we had last night, and if so how?
Will wrapping them up cause more problems? Do they need a bit of frost to help them strengthen?  :?


Any advice/imparted wisdom will help me sleep

TIA

Robb