Vitax Hydrangea Colourant is a specialised soil additive that enables gardeners to alter pink hydrangea blooms to beautiful shades of blue or mauve. It works by acidifying the soil and increasing the availability of aluminum or iron—key elements for developing blue pigmentation in the flowers. Acidifies Soil with Iron/Aluminum Salts: Contains iron and aluminum compounds that increase soil acidity—a critical condition for blue hydrangea blooms.
- Granular & Soluble Form: Offered in a granulated format that dissolves easily in hot water, making it simple to mix into soil or apply as a dilute treatment.
- Versatile Application: Suitable for both potted hydrangeas and those planted outdoors, providing flexibility for container gardens and landscape beds alike.
- Weekly Maintenance During Growth: After initial soil integration, it should be applied weekly through watering with a dilute solution for continued color enhancement.
- Ideal for Acidic Soil, or Double-Dosed for Alkaline Soil: Best results occur in naturally acidic soil. In alkaline conditions, simply increase the dosage for effective results.