On Mon, 10 Oct 2011 09:41:07 +0100, stuart noble
wrote:

I think ammonium sulphate is more widely available and, according to
some, also works on hydrangeas. Judging by the smell, the ammonium part
seems to be released when mixed with water.

Aluminium sulphate is available on eBay and Amazon if that helps. If
nothing else, it will help to keep slugs at bay! IIRC the hydrangea
colourants need to be applied very frequently.

Cheers, Jake
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URGling from the less wet end of Swansea Bay where it's ....
wet!

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