Hydrangea macrophylla seedlings

We’ve grown Hydrangea macrophylla, aka: mophead hydrangea for over 50 years, so I was shocked this week, to find that they had seeded into the cracks of our concrete paver walkway. I’m sure it won’t take long for the native plant zealots to call for an immediate ban on all non-native hydrangeas. Sadly, that’s the