Originally Posted by livingplanet3

UPDATE: After having looked at many example photos online over the past few days, I'm reasonably convinced that my Rosemond Coles were indeed infected with virus. So, yesterday (wearing disposable gloves) I decided to just carefully dig up all 10 of these plants, which have now been double bagged, and set out for pickup in the trash. It's just not worth it to risk the possibility of these plants eventually infecting my other canna varieties. Removing 10 diseased plants to potentially save 25 others from also becoming infected, definitely makes sense.

Incidentally, the Rosemond Cole rhizomes were imported by the WI supplier from Holland, which I've since learned has been having major problems with canna viruses for years.

Fortunately, my diseased cannas weren't very problematic to remove, since they were still quite young and I'd planted them with considerable spacing. As an added precaution, I took out a large amount of soil from around each one (leaving holes at least 12" in diameter & 12" deep).

A link that discusses canna viruses -

https://www.canna-virus.org.uk/

The symptoms that my cannas had, clearly matched those of the plants shown in the photos at the above link.