How does a hydrangea tell you what kind of soil your garden has?



Hydrangeas are shrubs with large showy flower heads. The flowers can be various colours, ranging from red to blue. The colour depends on the type of soil they are growing in. If your soil is rich in chemicals known as alkalines, the hydrangea flower will be pink, red or white, depending on the type you are growing. The opposite to alkaline soils are acid soils. Hydrangeas grown in these will produce blue or mauve flowers.



However, gardeners hydrangeas can cheat a bit if they want to. Pink-flowering hydrangeas can be encouraged to turn blue by feeding them a chemical called aluminium sulphate in autumn.



 



Picture Credit : Google