Answer: Big leafed hydrangeas should bloom at an early age, so there may be some condition that is not suiting them. One of the most common reasons for them not to bloom is that they have pruned at the wrong time and the blooming wood has been removed. (They bloom on the wood from the previous year.) Another very common reason is winter damage. If they are in an exposed location, subject to excessive wind, or in a cold microclimate the blooming wood will be killed each winter and this will result in no blooms. I hope this helps you troubleshoot the problem.
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