I'm ready to dig up my Tibouchina urvilleana and allot the space to something that blooms more often. It bloomed nicely in 2011:
After that, it did not bloom again until 2015, when it produced only a few blooms before the frost cut it down to the ground. Each year it is killed down to the ground by frost. It comes back from the roots each year, but it usually doesn't start producing buds until November, at which time it is then killed by the frost again before the buds have a chance to open.
It's a very pretty shrub, but I can't wait four years between blooms anymore.
