Answer: The flower buds are concentrated more toward the tips of the branches so trimming them back will definitely reduce the display. You should be able to see the buds for next year's flowers now, and since the plant blooms on wood produced the year before, any pruning now will cut off next year's blooms. Unfortunately the buds are really considered hardy only to zone 6 and your area is probably just too cold for optimum results. In a sheltered microclimate you might have slightly better success. Wrapping the plant is a huge job and may or may not help. Protecting it from wind is probably the most important thing you can do, followed by making sure the plant is well watered up until the ground freezes. I'm sorry I can't be more encouraging.
Q&A Library Searching Tips