White rose jasmine is a semi-tender vine that is winter hardy in USDA Zone 8. Botanically classified as Jasminum polyanthum, it is sometimes referred to as “winter jasmine” or “rose jasmine.” The pointed flower buds have a pink or rose tint and open to reveal fragrant white flowers. This houseplant does best moved outdoors to a protected location in full sun during the growing season.
Choose a spot indoors for your white rose jasmine plant that is in bright sun and put it in a south-facing window or a cool greenhouse. White rose jasmine needs bright, direct sunlight to grow flowers.
Add extra humidity by grouping plants, or set white rose jasmine on saucers filled with pebbles. Add water to the top of the pebbles, making sure the water does not cover the tops of the pebbles. Water evaporation will add humidity.
Grow white rose jasmine indoors in a cool room with temperatures of 65 degrees F. or lower. Jasime will not set flower buds at warmer temperatures.
Water only as needed, when the soil feels dry ½ to 1 inch below the surface. Water thoroughly until it runs out of the bottom of the pot.
Relocate your white rose jasmine outdoors for the growing season, after the average date of your last spring frost. Begin by placing it in the shade. After a day or two in the shade, move it into the sun for two to three hours for the first day. Each day, increase the time in the sun by an hour or two, so that the white rose jasmine gradually gets acclimated to the bright, outdoor light.
Fertilize every week with a water-soluble fertilizer specially formulated for flowers or blooming plants. Use a mixture that is half of the manufacturer's recommended rate of application. Apply fertilizer only when the soil is already moist from a thorough watering, and avoid fertilizing when the soil is dry. Fertilize only during the growing season when the plant is outdoors.
Move the white rose jasmine indoors in autumn when the average nighttime temperatures fall into the lower 40's F.
Prune white rose jasmine only to remove faded flowers or to maintain its size or shape.