Changes pink hydrangeas to blue
- Pale pink varieties tend to blue best
- Darker pink varieties turn to mauve/blue
- Treat as per pack instructions
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Hydrangeas are naturally pink, but where the soil contains iron or aluminium salts they will produce blue flowers . If you want blue flowers and your soil isn’t rich in the necessary salts, Vitax Hydrangea Colourant provides the solution.
Pale pink varieties tend to blue best, with the darker pink varieties tending to produce mauve/blue flowers.
Mix the colourant with the soil when planting pot or outdoor hydrangeas or dissolve in water and apply.