I'm wondering what others experiences and recommendations are for whether to single or double trunk frontenac and seyval. I generally prefer single trunks to reduce non bud-count growth and for easier management of the vine shape. But I do keep a second trunk for my Chambourcin & Traminette due to crown gall potential. I would anticipate that the Seyval would do well with a single trunk since my Cayuga (with Seyval in its parentage) does well with this system. However, I am not sure about the frontenac, though given its vigorous nature I would also lean toward a single trunk.