Blue Hydrangea

[terrington]

Ihave been given a blue hydrangea and would like to plant it out, i have been told it will change to pink, is there a way for me to keep it blue?

[waiglet]

I've been told blue hydrangeas need an alkali soil (with a pH less than 4.5). Adding aluminiun sulphate seemns to be the way to do this if your soil is too acidic.

You can buy special pellets in most garden centres to change the colour from pink to blue. Good luck.

[GypsyGSD]

I read somewhere if you put copper coins in where there planted keeps the colour never tried it though GypsyX

[cardicomper]

My Dad used to put some rusty nails into the soil and that worked a treat.

[hammerman]

Waiglet....a pH of 4.5 is acid....extremely acid. Hydrangeas do prefer an acidic soil (peaty or clay soils) and this will indeed keep the flowers blue as will the addition of aluminium sulphate.....you can probably buy a "blueing compound" from the garden centre.

Hydrangeas also like pretty moist soils so try not to let them dry out in summer.