Description
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
Ingredient
Aluminium (Al) as aluminium sulphate 2.5% w / v