For changing pink hydrangeas to blue
Hydrangeas growing in the presence of iron or aluminium salts will tend to change colour and produce blue flowers. Varieties naturally pale pink tend to blue best, the darker pink varieties turning to mauve/blue. Best results are obtained with plants growing in acid soil.
Apply: When required.
How to Use: For pot hydrangeas mix the Hydrangea Colourant with the soil when potting. For outdoor grown hydrangeas mix the Hydrangea Colourant with the soil where the root system will develop when planting.
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