When the tangerine vine is young or first being established in a new location, its water needs are especially important. Be sure to follow a regular watering schedule during its first growing season to establish strong, extensive roots. Even with a daily watering schedule, pay close attention to the moisture of the soil during establishment. If the soil feels bone dry, give the vine some extra water to avoid stressing the roots.
Once it has established an extensive root system, a tangerine vine is relatively tough and can handle both short stints of drought and short amounts of time in standing water. At this point, extra care and watering aren't as necessary overall, especially in moderate weather conditions. However, pay attention to signs of stress caused by water needs, including yellowing or browning leaves, and water the plant accordingly.
Texas is most prone to drought in the summer, and this is the season when you must pay close attention to the water needs of your garden. If the cross vine is in a full sun position, the soil is likely to dry out quickly between rain and scheduled waterings. Though the tangerine vine is somewhat drought tolerant, in the drier areas of the state it's important to note when the soil has been dry for a long time and look for signs of water stress such yellowing leaves, and then give it extra water if necessary.
As a semi-evergreen plant cold-hardy to U.S. Department of Agriculture plant hardiness zones 6a to 9, the tangerine vine may drop and lose its leaves in the winter, especially in the northern regions of the state. Don't read this as an excuse to overwater. Check the soil in the case of an oncoming freeze and water if necessary, because moist soil can provide a bit of extra insulation for the roots.