Name: Sandy B. Ford River Twp, Michigan UP (Zone 4b) (Zone 4b-maybe 5a)
Kathy, I hope you will get some good answers to your questions! In the meantime, if you haven't seen this (old) thread, you might find some of the information you're looking for there: The thread "Grafted Tomatoes" in Vegetables and Fruit forum
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer C/F temp conversion