I tried an experiment with two blue hydrangea plants -- everyone says that they can't grow in the area we live in, but I planted them last summer, covered them up over the winter, and I can now see some little buds coming out. So it looks like they survived the winter and I'll have some blooms this summer :)
I'm looking for info on two things:
(1) I read somewhere that hydrangeas sprout new growth from the dead growth. Does this mean that I should leave all the dead branches from last year on the plant??
(2) How do I make sure the flowers are blue?? I buried rusty nails in the dirts around the plants -- the iron from the rust presumably helps with the colour. I think I read somewhere that aluminium something-or-other will also make the flowers blue. Does anyone know exactly what I need to use??
Sorry, I don't know much about gardening!!