Keeping hydrangeas blue with azalea soil & vinegar?
I currently have 3 mopheads growing in containers. They were blue when I first got them and then turned pink. I have been trying to turn them blue with the espoma acid soil sulfur every 60 days for a year now, but they still are pink. I am planning on buying more this spring including my first endless summer and was wondering if I planted them in azalea soil and watered with vinegar, would that keep my hydrangeas blue? I vacation in Cape Cod every summer and envy how almost every home there seem to have huge blue hydrangeas bushes in their yards and I want the samething! Let me know, thank you!