Can someone help me identify this one. We bought a "nikko Blue" hydrangea and apparently it was included at no extra charge. It is about 10" high with tiny tiny flowers. They appear white but if you look closely they are a pale mauve, note the colour of the buds. Is it: invasive, a perennial, a native etc. It's kind of pretty and I don't mind keeping it but I don't want 4000 of them either thanks,
