We have a blue hydrangea (not sure what variety) that is probably 20 years old. My wifes granny had it for 10 years and then it was transplanted to our place. The plant blooms well in the summer, however, it is ony 2 feet tall and maybe 2 feet around. The plant has maintained that size and not grown at all in at least 7 years. The plant is in a bed under a very large cherry tree. I know the hydrangeas like shade, however this location gets no direct sunlight at all, it's always shaded. So we are thinking of moving it to a location where it would get some morning sun in hopes that perhaps it will help it grow some. When is the best time to transplant a hydrangea of this age without damaging it? it is an apparantly healthy plant, it just won't exceed it's 2 foot stature. Appreciate any thoughts Y'all might have.