The ideal temperatures are between 60°F (15°C) - 80°F (27°C). Allowing temperatures to go below 55°F/12°C can harm the plant. Avoid having a plant sitting near cold drafts.
A brightly lit spot without direct sunshine is suggested. A small amount of morning or evening sun is not a problem.
I would try and keep the soil slightly moist at all times and in the winter allow the soil to dry. You should be able to leave a dracaena reflexa for up to a month during winter without water and no harm would be caused. Over-watering can kill these.
A fast draining potting soil mix is best to use.
Feed every four weeks from April until September using a 10-10-10 diluted liquid fertilizer.
I would suggest re-potting once very 2 -3 years and a pot one size bigger if it's becoming terribly pot bound. Slightly pot bound is fine.
Normal room humidity is usually fine, however, if you can?....(this will help your plant grow well) provide higher humidity levels. You can can improve the humidity by placing the plant on a tray of pebbles sitting in water (water below pebble tops) or use a humidifier.
These are easily propagated with stem tip cuttings (about 3 -5 inches long). Place the cutting (usually more than one) into a new pot with a moist potting mix.
You will find the lower leaves on this plant turn yellow after a period of time which is normal. Remove the lower leaves when they begin to yellow. You may also want to clean the leaves with tepid water using a soft sponge – to help it look attractive.