Hydrangea Colourant 500g

Westland Hydrangea Colourant contains a combination of iron and aluminium salts. This acidifies the soil to change pink flowers to blue. This also helps rooting and establishment of cuttings.

• 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