Q.Grafting
I had a lemon and 2 kinds of pink grapefruit all on one tree. I moved and it stayed. I would like to try to create a new one. Do you have any helpful hints or advice for me? And thank you for all the great info from you guys. It’s been accurate and dependable.

Thank you, we love to help gardeners!
I'm sure it was tough to leave that tree behind.
I listed a few links for you to help you get started-again.
https://www.gardeningknowhow.com/ornamental/trees/tgen/what-is-a-graft-collar.htm
http://www.fruitmentor.com/grafting-citrus-trees-cleft-graft
https://www.gardeningknowhow.com/edible/fruits/lime/lime-tree-grafting-budding-lime-trees-to-propagate.htm