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.
Soil pH affects the colour of hydrangea flowers.
NOTE: Acidic soil (pH4.5-5.5) will produce blue flowers, less acidic soil (pH5.5-7) will produce pale, purplish flowers, while alkaline soil (pH 7 -8.5) will turn flowers pink.
• Fast acting liquid
• No handling of dusty powders