Oh, you beat me to it Carl. Shoot! That is one great page.

Speaking of grapes. I have a grape that was growing on my property
when we bought it. The lot next door was vacant and the previous
owners took liberty with the property line. Well, soon after we moved
in the owners decided to build and I had to move the grape. I put it
in a great big 20-25 gallon pot right along with the original soil.
That was over a year ago. It grew well last year even after being
nearly defoliated by late frosts 2-3 times.

This last week I decided it was time to get it in some better soil.
Low and behold I found that the ground level on it had been raised
three times as it had three distinct rings of roots growing down
there. All active. So I separated and divide the lower two and potted
them up too! Now I have three grapes if they take, which I am fully
expecting them to do.

Steven
Northern California