have a lemon tree. It bore 1 lemon years ago. believe it froze and then grew from root when,how to graft?

Answer 1

The link below has detailed step by step instructions and pictures on how to graft (bud) citrus. This is best done in the spring, early summer, or early fall when the plant is actively growing. Midsummer heat or drought stress can reduce your chances of success. Overall the budding process is easy, it just takes a little practice to get coordinated, like anything else. You can cut plastic strips from a bread sack to wrap the buds.

http://aggie-horticulture.tamu.edu/citrus/budding/budding.htm

Answer 2

1 lemon? years ago? sounds like that tree just isnt making the effort, or its gay.