Grumpy's sure-fire, no messing around, always guaranteed correct answer: Gardenia blooms on new growth, so you can prune it now, this winter, or early spring without eliminating the blooms. The only time you don't want to prune is when it's setting flower buds or you'll cut off all the flowers.
Keeping this in view, what is late winter?
Late winter is a good time for pruning in many regions. Here are some tips and a list of common shrubs and trees to prune in late winter or early spring. Pruning deciduous plants in the winter promotes fast regrowth in the spring, as most plants are dormant during the winter.
What is the best time of the year to trim bushes?
Cut back shrubs grown primarily for their foliage, such as barberry and burning bush, almost anytime except in late autumn. New growth that starts after late-season pruning won't harden off properly before winter. If you want to do major pruning, it's best to cut the shrub back when it is dormant in winter.
What is considered late fall?
Since Fall begins at the end of September (usually September 22nd) and ends at the end of December (usually December 21st), it seems much more logical to say that October through December are considered Fall months instead of September through November.