|I have had 2 vines growing for 4 years without ever blooming or grapes. What should I do to convince them to produce?|
|Your grapevines are certainly old enough to produce fruit so I think there's a problem with the climate for the variety you're growing. If muscadines are subjected to late frosts they won't flower and produce fruit. There is an excellent publication from the University of Tennessee that addresses grape growing and associated problems:
Hope you find it helpful!