Flowering Mandarinquat Tree

 
A few weeks ago, my mandarinquat tree started flowering like crazy.  I'd never had a citrus tree that did so as much.  The blooms ran all along the stems and filled the room with the most pleasant scent.


Hopefully this means that I'll get a semi-decent crop this year, and by that I mean a number greater than four, which is what I got last year.


Speaking of mandarinquat trees - I have two, though I'm a bit concerned about one.  I'd purchased them from an online nursery a couple of years ago and had expected that their growing habit would mirror one another.  In this picture, you can see that my 'good' tree has small narrow leaves and has flowered consistently during the past year.


My 'bad' tree produces wider larger leaves and has shown no indication that it will ever want to flower.  (They are lighter in color in this picture because they are new leaves.) It's also more vigorous in its growth than my good tree.  I've given my trees the same potting soil, same fertilizer and same growing conditions so I'm at a loss as to why my bad tree is not flowering at all.  All of the growth on my bad tree is happening above the graft line but I'm wondering whether it's still possible for a root stock to assert its characteristics here somehow.  It might be time to consult a professional.