Grow Healthy Hydrangeas

Hydrangea

There are several types of Hydrangea to consider. The Mop Heads or Hortensia above, the lace caps or other species. They are a rewarding group[ of plants to grow well but need the right conditions to excel.

Provide Suitable Growing Conditions

  • All hydrangeas thrive in moist well drained fertile soil.
  • Too wet and humid and you may get root rot and botrytis on foliage.
  • Hydrangeas appreciate partial shade.
  • Shallow chalky soil or light sandy acid soil may cause yellowing of leaves. To cure this water or foliar feed with Epsom salt (Mangenisum Sulphate).
  • Hot dry conditions can encourage powdery mildew.
  • Hydrangeas can be prone to insect attack from Aphids, Red Spider mite, Capsid bugs and even Vine Weevil.

 

Hydrangea

 

Flowering Problems

  • The main cause of non-flowering is pruning too hard and cutting off the buds. Just trim off the old heads in spring to the first fat buds.
  • The failure of flowers to turn blue is caused by a shortage of trace elements of Aluminium. This is available in acid soils but not alkaline soils.
  • Some species will change from pink to blue by using a proprietary preparation or colourant. This is unlikely to work when the soil is too alkaline.
  • If you have a pink flower this can be enhanced by applying limestone or chalk during winter.
  • White flowers remain white whatever you do. Some fade to a pink tinge.

8 foot hydrangea

 

Other Sources of information

Hydrangeas available from Thompson & Morgan

See Help to change Hydrangea colour
Hydrangea Hydrangea an enthusiasts site

Amazon for Hydrangea books


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  1. Help Change the Colour of Hydrangeas | Gardeners Tips - October 17, 2011

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