How to protect roses in the winter<br>Reduce water and fertilizer 6 weeks before the first frost. This is a popular technique among rose gardeners, known as " hardening off. " reduce the water by half and stop fertilizing altogether to help prepare your roses for the cold weather.

Based on that paragraph can we conclude that this sentence is true?
You can protect roses in the winter four times.

Available options: (a). Yes. (b). It's impossible to say. (c). No.
(b).