Does the use of rusty nails actually work to keep hydrangeas blue?
I have a new blue variety which has come through purple and I see that there
is not a blue one on the street. I know all about acid and alkali, but
wondered whether I need aluminium sulphate blueing powder or whether the
cheaper alternative really works.
--
Jim S
Tyneside UK
http://www.jimscott.co.uk