Posted: 16/07/2015 at 12:58
aluminium is not essential at all for blue hydrangeas, in my opinion. good quality acid soil and good quality blue hydrangea. As an added factor use rain water. No, rusty nails,amd screws do not make the slightest difference except to your fingers when you weed.
ceanothus yankee point is happier in fhe soil. A vigorous..much too vigorous plant .....for any pot.
blues? Nice dwarf rhododendron? ,agastache blue boa? Agapanthus? Caryopteris? Ceratostigma? Verbena Rigida? Scabious butterfly blue? Felicia for summer? Lithodora? Lavendar? Nepeta? Geraniums like rozanne? blue salvias?