Nighttime Frost

Question

How dangerous is a two-hour period of 31 degrees in mid-April when tender shoots are out?

Answer 1

It depends on the type of shoots and if it can handle that temperature for any amount of time, unfortunately.

These articles will help you to protect plants from winter:

https://www.gardeningknowhow.com/plant-problems/environmental/protect-plants-in-freeze.htm

https://www.gardeningknowhow.com/plant-problems/environmental/frost-how-to-protect-your-plants.htm