Ask-a-Dave's-Gardener: Hydrangea paniculata propagation help, 2 by Flowers298

Flowers298 wrote:
I took my cutting from my limelight’s my vanilla strawberry hydrangeas every year and they are big plants now! But they only bloom little pink flowers all up and down the stems. I just don’t understand why there not like the mother plant I got the cuttings from? Here are pictures of what I get every year at this time. The first two pictures are them & the last two pictures are the mother plants . Anyone know what’s going on? Please help!