Ok, let me rephrase, growth will be very slow when temps are below 50, almost like stopping growing.

The roots don't like to go below 50 degrees. If the leaves freeze the expansion of the water into ice in the leaves will destroy the cells in the frozen areas.

I almost feel like you want me to say whatever it is you want to hear. Maybe I should go toke and get a decent frame of mind. Sorry if too curt.