Hydrangeas that grow where iron or aluminium salts are present tend to change colour and produce blue flowers. Depending on the variety, pale pink hydrangeas will turn blue best with darker pink varieties turning to mauve or blue. After establishment of plants dilute the colourant as directed and water weekly during the growing season. Vitax Hydrangea Colourant is the perfect product if you want to keep or even turn your Hydrangeas Blue.

HYDRANGEA DIRECTIONS FOR USE POT OR CONTAINER GROWN HYDRANGEAS HYDRANGEA

I used and preferred the powder as it was cheaper, lasted longer, and I’ve been told that the liquid can easily burn the leaves if spilt. This type of compost is usually marketed toward gardeners growing blueberries, rhododendrons and azaleas, but its high acidic content makes it perfect for growing blue or purple hydrangeas. When I tried this, I found that the ideal pH for blue hydrangeas is around or just below 5.5. At this level, blue hydrangea flowers stayed blue; pink turned blue, and red flowers turned purple. Vitax Hydrangea Colourant won’t feed your plants it will simply cause the flowers to change colour, so you might want to also use a general purpose plant food or Vitax Hydrangea Feed for the ultimate blooms. Features You’ve probably heard that you can change the colour of hydrangea flowers by making some changes to the soil.To change it from blue to pink (or from purple to red) you’ll need to reduce the acidic content in the soil by adding alkaline.

How to Grow Blue Hydrangeas [And Keep Them Blue]

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Vitax Hydrangea Colourant, 500g - Newgate Nurseries

Acidic soil will yield the best results, but if you don’t have this you can double the proportions of Hydrangea Colourant. From classic designs to trendy patterns, our autumnal wellies are both functional and fashionable. Whether you're hiking through colorful forests, jumping in puddles, or strolling through pumpkin patches, our wellies are your go-to choice for staying dry and comfortable. Shop Wellingtons >The easiest way to change the pH, so it’s more acidic is to add aluminium sulphate in powder or liquid form.