- If your soil isn't acid, that blue hydrangea you planted will turn pink. Turn it back to blue by adding Vitax Hydrangea Colourant to the soil
- It is formulated with iron and aluminium salts which acidify the soil to produce blue flowers
- The colour change will be best with pale pink hydrangeas, with darker pink varieties turning to mauve or blue
- Use it in the garden or in pots, and treat as a pH experiment to show kids what happens when soil pH changes
What you need to know:
- 1 x Vitax Hydrangea Colourant 250g
- Changes pink hydrangeas to blue
- Contains iron and aluminium salts to acidify the soil
- Use for both pot grown hydrangeas and those grown outdoors
- Dissolve in a little hot water and mix with soil for best results
- Apply weekly during growth
- Always keep out of reach of children and wear protective gloves and eye protection where possible during use
