Keeping Hydrangeas Blue - Knowledgebase Question

Tonbridge, In
Question by mlocke1
May 16, 2002
If I use Hydrangea Colourant to make the soil acidic for the blue hydrangeas, if there is a pink planted next to it, will it also change towards blue too. How can I have a blue plant and a pink one together in the same soil.

Answer from NGA
May 16, 2002


Although many of the bigleafed hydrangeas will change color in response to the soil pH, some have been bred to remain a constant color, or relatively so, over a range of soil pH. You might look into some of the varieties selected for steady (or almost always) pink coloration such as "Forever Pink" or "Pink Elf" or "Pia" or "Glowing Embers" among others.

You might also simply allow room between the hydrangeas to avoid having the acidifier contacting the soil around the "pink" hydrangea's roots. You could fill the space with a garden bench, an ornament or perhaps some other type of plant that would complement the hydrangeas.

Enjoy your pink hydrangea!

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