Syzygium Luehmannii
 

Hi
Can anyone tell me why the three plants I have that are now 3 - 4 yrs old &
stand about 2 metres tall, have never flowered/fruited?
They are very healthy otherwise & put out nice red shoots.
I have pruned them to try & make them a bit bushy, but have not cut so much
of the plant that it wouldn't grow back well.
Thanks in advance for any advice you may give.
Pat