Hydrangea macrophylla is commonly called the mophead type, and their flowers are what most gardeners long for: “People lust after those big blue flowers that we go gaga about and people don’t ...

According to award-winning garden expert Andy McIndoe, you can encourage your hydrangeas to produce blue flowers. The colour of hydrangea blooms is determined by the pH level in your soil and the ...

If you want pink hydrangea flowers, apply garden lime, which raises soil pH. For blue hydrangea flowers, add aluminum sulfate to the soil, which lowers pH. Is there a homemade fertilizer for ...

The gardener behind Hydrangea ... for your flowers. Having slightly acidic soil is also a natural way to change the colours of hydrangeas as it will make them turn a vibrant blue or purple.