Buy young plants always. The best of growers cannot maintain the vigour of Roses which have been subjected to forcing unimpaired for many years. Young plants are best, and it is not at all a bad plan to buy them a year old from the bud.
Roses in pots may be bought at any period of the year. Autumn is perhaps the best, as good plants are tolerably certain then. If there is a sheltered place at command, the plants will do out of doors with the pots plunged in ashes, but in cold places it is wise to winter the plants in a cool house, pit, or frame, if such a convenience is at command.
Many people pot Roses from their own gardens; the time for this is October.