That's an old tree, I don't think I've seen a grapefruit that big so I can understand the sentimental value.
Some different citrus problems here but it looks like Citrus Gummosis, there's a bit about it...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.