Jasmine has a delicate, dainty appearance, and although it can be a bit fussy, it's an easy-to-grow houseplant, as long as a few basic needs are tended to. In order to be healthy, jasmine demands cool temperatures and bright light, but the payoff is beautiful blooms and a heady, sweet fragrance in the depth of mid-winter.
Put jasmine in a cool room, preferably below 68 degrees during the daytime and 55 degrees at night. Although jasmine will grow in warmer rooms, they won't bloom. Make sure the plant gets at least six hours of bright, filtered sunlight each day, but don't put it in direct sunlight.
Keep jasmine away from heat vents or radiators. If the air is dry, use a humidifier or set the pot on a plate or tray filled with wet gravel or pebbles.
Test the soil before you water jasmine, because soggy soil can kill the plant. If the top 1/2 inch of the potting soil is dry, it's safe to water.
Fertilize jasmine twice monthly from early spring to late summer, using a water-soluble houseplant fertilizer diluted to half strength. Don't fertilize at all during fall and winter, which is the plant's dormant season.
Take steps to encourage blooms the next season. For four to five weeks in autumn, put the plant in a cool room with bright light but absolutely no artificial light. The nighttime temperatures should be between 40 and 50 degrees.