flowering quince and others that
bloom in the spring, generally set their flower buds the
reason they fail to bloom is that people prune these
during the winter along with their ornamental or fruit trees.
This simply cuts off the buds that would have resulted in
flowers the next spring.
These types of shrubs should
be pruned after they finish flowering.
Some springs, the tops of
forsythia bushes fail to flower. Lower parts of the stems may
be packed with the yellow blooms. The problem is that
forsythia flower buds may be killed during an extremely cold
winter. If snow has piled up the stem a couple of feet, the
lower buds are insulated and survive to produce flowers.