Westland Hydrangea Colourant 500ml
Hydrangea Colourant is a salt which changes the colour of pale pink hydrangea varieties to blue and darker pink varieties to mauve blue
- Mix the Hydrangea Colourant into the soil at the rate of 50g per square metre.
- Every 7 days during the growing season dissolve 50g of hydrangea colourant in 5 litres of water and apply to the area of soil covered by the shrub.
- Do not apply directly on plant foliage.
- When potting, mix the Hydrangea Colourant into the compost at the rate of 50g per 5 litres of compost.
- Every 7 days during the growing season dissolve 50g of hydrangea colourant in 5 litres of water and water the soil round the plant.