The temperatures won't hurt roses at all, they can take freeze down to about 28 or 30 degrees.
From the tennessean.com
They slow it down, freeze it, slow it down, freeze it again.
From the couriermail.com.au
When an oil tanker barrels down the road, they freeze and then scatter in fear.
From the cnn.com
They have been assisted by 100-plus volunteers and botany colleagues across Texas who helped collect the seeds and prepare them to freeze down at minus 4 degrees Fahrenheit for 200 years or more.
From the sciencedaily.com
Stone channels would be widened so the water wouldn't freeze on its way down.
From the time.com
Ubuntu doesn't freeze, slow down, demand your attention or decide to shut down your computer.
From the economist.com
When you're on the receiving end you freeze, shut-down, cry, panic.
From the blogs.psychcentral.com
Unless that's cold enough that the oceans would eventually freeze all the way down?
From the guardian.co.uk
Dirty units can cause AC coils to freeze over, shutting down the equipment.