I've had them for about 4 years. They grow on a trellis. My question is that only one of the plants will bear a few blossoms in the early spring but it never produces any fruit. They receive several hours of morning sun, then light shade starting about 1:30 or so. They have well drained soil. They grow on the"sunny" side of some redwoods. I water them once a week. The vines are leafy and grow well, but I want to know what I can do to make them flower better and produce fruit.