pirl said:I wouldn't call it variegated. It looks more like a nutritional deficiency to me. If you have any Ironite around you may want to give some to the dahlia.
Home Depot and Agway carry it.
It can't be that. I got it with two others in a 3 pack, same soil and light for all 3. The other two always had green leaves and still do. I re potted them all to large pots with excellent soil. They all grew and bloomed but the leaves for this one never changed to all green.