Westland Hydrangea Colourant 500g

Westland Hydrangea Colourant is a salt which changes the colour of pale pink hydrangea varieties to blue and darker pink varieties to mauve blue.

• Changes flowers from pink to blue
• Acidifies the soil to produce blue flowers
• A combination of iron and aluminium salts
• Can be added to alkaline soil to change pH.
• Easy to use
• Up to 10m²