Answer: It will be easiest on your plants if you move them while they are dormant (winter). Now that you've discovered the best time and method to prune, you should have lots of blooms on your plants. The flower color on some types of hydrangeas depends upon the soil pH. I'd transplant the hydrangeas and then wait to see if the colors change. If so, you can apply either sulfur (for blue flowers) or lime (for pink flowers) to the soil in the very early spring to change the color of that year's bloom.
Q&A Library Searching Tips