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Why were my mums yellow?

I propagate mums from cuttings. Last year my new crop were interestingly variegated, as I take cuttings from many colors and when I pot mix them up. This year I did the same thing, but all of the new plants are yellow!!!! Can you explain why?
Submitted by lucymcl1



Thanks for writing. Hybrid plants will sometimes revert --- meaning they'll go back to being an old form. If your varieties originally came from a yellow variety, they could be reverting back to form. There's not really anything you can do to prevent this; it's just part of nature.


---Justin, Senior Garden Editor,

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