Q.Royal Empress tree
Hello.
How many years old or what height will it be before it flowers?
Does it need another tree to pollinate it?
Thanks.

Certified GKH Gardening Expert
It is believed that another tree is needed to pollinate it for seed production, but that the pollen travels far, so that tree could be across town. It will still produce flowers without a pollinator. If you are looking to prevent seed production, there are sterile varieties available that will produce flowers but not viable seed.

Certified GKH Gardening Expert
This tree usually flowers at about 3 years old, though this can vary based on how well suited the planting site is to the species.