Yates Hydrangea Blueing Liquid Aluminium Sulphate Fertiliser & Soil Acidifier 500ml

Apply to hydrangeas to produce and deepen blue coloured flowers. Supplies aluminium, which is needed to produce intense blue-coloured hydrangea flowers. An easy to use liquid formulation, Yates Hydrangea Blueing Tonic is easy to dilute and apply with no handling of dusty powders.

Features

Soil pH affects the colour of hydrangea flowers

Acidic soil (pH 4.5-5.5) will produce blue flowers

Less acidic soil (pH 5.5 to 7) will produce pale, purplish flowers

Alkaline soil (pH 7 to 8.5) will turn flowers pink