My parents have beautiful red cannas in their garden, they brought them yrs ago from the house we lived in when I was a kid. They were there when they bought that house 34 yrs ago. These cannas have always been red as far as I know. They get very tall, I don't know the exact species but they are beautiful. Anyway, out of the blue I notice amongst the red blooms a tall bright neon yellow bloom with a shock of bright orange in the center. I asked if they had planted a different kind and they said no, but that every now and then one changes color. My mom seems to think theyre somehow mixing with the yellow and orange lantana it's beside but I thought that seemed silly. It is almost exactly the same shade of yellow and orange though. My question is does anyone know the reason for this? I asked how often it happens and my mom couldn't really say, maybe every few yrs one odd colored one, the rest red. I think it fascinating and want to know why. Surely my moms not correct that completely different plants can somehow cross pollinate and affect the color of one.