Unexpected color variation on lilac tree

Asked May 10, 2019, 8:31 PM EDT

I have a lilac with purple white-edged blossoms that produced a branch with all white blossoms. All the rest were the usual color. It’s kind of cool, but I was wondering what would cause this?

Yakima County Washington lilacs

1 Response

Thank you for your question. Since many lilacs are grafted onto rootstocks, I suspect that your purple scion was grafted onto a white rootstock, and thar the rootstock has managed to put out a sucker (from the root), that has matured into a plant. You can check this by following the white plant downward to see its base. You can also compare the leaves to look for subtle differences. Here is an article on these plants: http://chemung.cce.cornell.edu/resources/lilacs Good luck!