of the most colourful flowering plants for the home
garden are hydrangeas, but did you know you can easily
change their flower colour to either pink or blue?
Hydrangea flowers can vary from brilliant pink right
through to vibrant blue. The hydrangea flower colour
is simply determined by the pH of the soil. That is,
the acidity or alkalinity of the soil.
It would be wise to buy a pH test kit to test the pH
of your soil. This way, you can monitor the pH as it
changes, and you can also easily see how far it needs
to change. Soil pH test kits are available from leading
For brilliant blue flowers, hydrangeas need an acidic
soil. That is a soil with a low pH of approximately
5 - 5.5. To make the soil acidic, apply Searles® Hydrangea
Blue to the soil every 3-4 weeks. Start now for wonderful
flowering later in the year.
On the other side of the coin, to develop their lovely
deep pink flowers, hydrangeas need an alkaline soil,
that is a soil with a pH of 7-8. To achieve this, apply
some dolomite or lime to the soil every 3-4 months.
It is important to start this after pruning, which is
usually late Autumn or Winter. This way when your hydrangeas
do flower later in the year, the soil pH has already
changed so that you end up with either brilliant blue
or deep pink flowers. The choice of colour is yours
and its easy to do.
In Spring, start to fertilise your Hydrangeas with regular
applications of Searles Flourish® Soluble Plant Food.
This will promote strong growth and help develop more
flower buds, which in turn means a far greater and more
For blue hydrangea flowers, apply Searles Hydrangea
Blue every 3-4 weeks
For pink hydrangeas, apply lime or dolomite every
In spring, start fertilising with Searles Flourish®
Soluble Plant Food. Searles Flourish® is easy to apply
by either a watering can, bucket or a hose-end adaptor.
the colour of your hydrangeas is great fun and if you
follow these easy steps, they'll look fantastic.
Happy Gardening with Searles from the Searle family.
© Copyright 2002 JC &
AT Searle Pty Ltd
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