The only roses that can be grown indoors are miniature forms. On average indoor roses grow 9-12 inches tall. There is no need to discard them, however if they can be given an annual rest period in a cold position.
Water moderately enough to make potting mixture moist throughout, but allowing the top half inch to dry out between waterings. During the rest period give only enough to keep potting mixture from drying out completely.
Apply standard liquid fertilizer once every 2 weeks in the active growth period only.
Re-pot every year in fresh potting mixture, just as new growth starts after Winter rest. They should be grown in soil-based potting mixture and in 5 inch pots.
Propagate in early Spring from stem cuttings, dip ends in hormone rooting powder and plant each cutting in a 3 inch pot of moistened equal parts peat moss and sand. Enclose the whole in a plastic bag and place in warm room in bright filtered light.
Actively growing roses need plenty of bright light. They will not flower well without 16 hours of bright light daily. An artificial light is necessary if some growth is to occur during the short day months. During the Winter rest period roses lose all their leaves and the quality of light they receive is unimportant.
Prune these roses at the end of the rest period, using sharp scissors to remove up to half the previous year growth. Make cuts directly above growth buds.
Throughout the growth period use scissors to remove faded flowers, cutting away 2 inches of stem with each flower.
When in active growth, normal room temperatures are siutable but plants that are to be retained must have a 2 month rest period in the cold, perhaps on an outside window-sill, porch or balcony through November and December.
High humidity is essential. Stand plant on trays of damp pebbles or moist peat moss and mist foliage daily, avoid flowers. Place near an open window whenever possible.
Watering is necessary when transplanting, but be careful not to over water.