I had a Blushing Bride hydrangea and it didn't come back the next year. Is it because I didn't cover it over the winter? Also, I bought a new one this year, but I don't know its name. The flower is like a mop head and it's a shade of almost a purple blue that turns into a pink, and its leaves are like a Blushing Brides. Can you please help me out as I love hydrangeas? Thanks.