I have an "extra" Riviera Rainbow that is about 3 ft tall with 4 branches. I am going to get brave and plant it in the front yard where the sun it. RR seems to be a strong one and a fast grower. If it should die back from the cold, it might actually come back in the spring. I also have an "extra" Aztec Gold but it is still cutting, size. Who do you think is strongest?? (I can also dig them up each winter.)