|copyright 2011 Joan Harrison
Most hydrangeas achieve a solid unified color when mature. These colors include blues, whites, purples and
pinks. Sometimes a flower will sport many colors at the same time. This can happen naturally but it can also be encouraged
by judicious use of soil amendments. The steps below will help you increase the chances of producing hydrangea flowers in
Plant your hydrangea in a container. You can try the technique with a hydrangea planted directly in your garden,
but you are more likely to have success with a container where soil conditions can be manipulated more easily than in the
garden. Use a good quality potting soil for good drainage. Make sure the hydrangea you select is capable of producing blue
or pink flowers (but not white).
Following package directions add aluminum sulfate to the soil on two sides of the container, opposite each
Again following package directions, add lime to the other two opposite sides of the container.
Wait until flowers emerge to see if multicolored effect has been achieved. What has to happen is that some
of the roots draw from the aluminum sulfate leading to shades of blue, and some roots draw from the lime leading to shades
of pink. You can't force the plant to do this but you increase the odds by following the steps above.
Make sure you follow the package directions for the aluminum
sulfate and the lime. Do not make the mistake of thinking more may be better. Too much could be toxic and harm the plant.