premise: 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.
hypothesis: This is for indoor roses.
reason: Reason:  Indoor roses don't need to be prepared for winter; they grow all year.  Why:  It's never explicitly mentioned in the context.