What are little green bugs on roses?

Aphids [Aphidoidea superfamily] most likely are the little green bugs on your hibiscus. They're voracious eaters. They particularly favor hibiscus for winter time snacks. They'll be gone once the...

Use an insecticide spray for aphids, or try spraying them with a solution of dish soap and water.

chroroplast, the green stuff that makes the leaves green.

you can use anything

I m also asking the same thing. I dont think they naturally exist. But they are probably dyed. The only green petalled roses are those for which the petals have been dyed.