The amount of growth on your potted roses will vary depending on when you buy the rose. Pot grown roses will be freshly potted from November to February, so they will not be fully rooted through. These roses will have new shoots beginning in March and April, will be in leaf and then buds May and June. They will flower in June and July. From August onwards, they may be trimmed back, ready to plant and burst back into life the next season.