Julia - until someone can give you the definitive answer I've had a look in my 'Houseplant' book and came up with a bit of information that might help. "The Winter Cherry" or "Solanum" should last until February. Early leaf fall usually means overwatering - dropping berries indicate too little light or hot, dry air.TEMPERATURE: Cool - keep at 50 - 60F in Winter. LIGHT: Bright light with some direct sun. WATER: Keep compost moist at all times. AIR HUMIDITY: Mist leaves frequently. CARE AFTER FLOWERING: Prune back stems to half their length in late Winter. Keep compost almost dry until Spring, then repot. Stand the pot outdoors during the Summer months - spray the plants when in flower. Bring back indoors in Autumn.