A treatment of hydrangea blue aluminium sulphate will reduce the soil pH around acid loving plants. Apply around blue coloured hydrangeas to deepen and brighten flower colour. Also recommended for use on azaleas, rhododendrons, camellias, daphne, erica and boronia.
Features and benefits
Apply 30g (approx.
2 tablespoons) per square metre of garden.
Lightly fork into the soil around the plant.
Water in well after application, taking care to wash any product off the plant foliage.