Story: Soils and regional land use

Blue and pink hydrangeas

Blue and pink hydrangeas

Some flowers react to the acidity of the soil by changing colour. Hydrangeas produce blue flowers in acid soils when they take up aluminium, and pink flowers in alkaline soils when aluminium uptake is prevented.

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Natural Sciences Image Library of New Zealand
Reference: Bo1358Rbt.tif (top); Bo1352Rbt.tif (bottom)
Photographs by G. R. Roberts

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How to cite this page:

Allan Gillingham, 'Soils and regional land use - Overview', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/photograph/17083/blue-and-pink-hydrangeas (accessed 20 April 2019)

Story by Allan Gillingham, published 24 Nov 2008