24 February 2021 01:42 PM
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Try 'Yates Hydrangea Blueing Liquid Aluminium Sulfate'. Supplies aluminium, which is needed to produce intense blue-coloured hydrangea flowers. An easy to use liquid formulation, with no handling of dusty powders. Click here for more info on this product: https://www.yates.com.au/product/garden-fertilisers/speciality-fertilisers/yates-hydrangea-blueing-liquid-aluminium-sulphate