Hi, I have a grape vine about 5 or 6 years old. It grows fine. At
one point it was 30 feet long or so. Covered in leaves. The only
problem is no grapes. My grape vine lives on Long Island New York.
The soil is not sandy and is fine for tomatoes, cucumbers, etc. The
year after I planted it I got one grape. Since then, nothing. Just
tons of grape leaves.
Grapes grow on second year vines. Prune back the branches that
produced grapes and let the rest go.