Is it normal for a young shrub, just planted in spring, to suddenly grow several very tall branches (4 or 5 feet)? Both of my ninebarks did this around the 4th of July. This pic was taken that day. Will the rest of the branches catch up or should I cut the long ones down to the size of the rest of the branches - about 1 and 1/2 feet now? My forsythia, planted same time, did this too!
I'd reduce the vigorous extension to whatever length you are happy with.
This is a result of the production system the plant was in before you bought it. Fertilization and moisture regimes can produce interesting results.
Thanks, VV! I had a hunch that's what I should do, but wasn't sure and don't want to harm it.
