What is your fertilizing schedule? The plant should receive doses of fertilizer during the active growing period.
It would be helpful if you could take some detailed photos of the leaves showing the shape of leaf and the veins; photos of the stem; photos of buds, flowers, seed pods if any. Also step back and take some photos of the entire plant so we can see the size, shape and form. That may help to narrow down which one you are growing. You are growing a tropical tree/shrub in a cool zone; yes, you selected a diva of a plant but the blooms are rewarding. Tibouchina like heat, humidity, acid soil and many hours of full sun.
The velvet-leaf, purple-bloom varieties that I can find:
T. urvilleana/Athens Blue Glorybush/Hybrid Glorybush
T. grandifolia/Large-leaved Princess Flower/Velvet-Leaf Tibouchina
T. heteromalla/Silver-Leafed Princess Flower/Glory Bush; sometimes sold asTibouchina grandifolia (or as Tibouchina grandiflora).
T. 'Jules'/Hybrid Glorybush/Jules Glorybush; dwarf variety developed in Australia; grows to only about 3 feet tall rather than 10 feet.
T. lepidota/Colombian Glorybush; native to Columbia and Ecuador - leaves are slightly hairy.
There may be others.
Curious.
Why are you ready to give it the heave-ho? Is it too much work or is it not producing flowers for you?
