Grow Star jasmine in the right regions. This plant is hardy only to U.S. Department of Agriculture Growing Zone 9, and dies in temperatures below freezing. Yellow leaves may be signs of frostbite in colder zones. Move the jasmine into a protected location, and maintain temperatures of 50 to 55 degrees Fahrenheit at night and 68 to 73 degrees Fahrenheit during the day.
Keep Star jasmine in the right locations, where it gets four to six hours of light every day. Star jasmine tolerates partial shade, but yellows and dies back with too much shade.
Amend the jasmine's soil, as yellow leaves most often signify poor drainage or nutrition. Dig 3 to 4 inches of organic compost into the top 4 inches of soil in spring, and add granular 10-10-10 fertilizer. Use manufacturer directions in regard to fertilizer quantity and application.
Give Star jasmine an arbor or trellis for climbing, to get the vines up off the ground. Use cord ties to secure the vines to the support.