Hello. On many sites about plant growing, the temperature zone of the rose is mentioned as a certain landmark. For example, TK in some varieties of hydrangeas is the same as in roses. When I wanted to know which zone the rose belongs to, I found nothing.
Can you please advise the literature in which you can read about the temperature zone for different varieties of roses.
I don’t know what grade my rose belongs to, every time I take it home for the winter. I'd like to know whether it is possible to cover it. Thanks in advance!
I highly recommend the book Vorontsov-Korobov “All About Roses”. You will definitely find answers to your questions there. But I don’t know where to buy.