Why Has A White Hydrangea Turned Pink ?

[pattricia 575]

I’ve had a white hydrangea in my garden for ten years. Last week I watered it with tomato feed. Later on after a few days I noticed that it had turned pink. I wonder why this has happened ? 

[nikki-red 308]

Hydrangeas change colour according to the PH of the soil, but white ones don’t contain any pigment so should stay white.

They can get a hint of pink or grey when they get old tho?

[Ghozer 112]

It depends which tomato feed you gave it..

Different feeds contain different things, Such as potassium, iron, zinc, boron, maganese etc...

(these will usually be shown on the bottle like "N,P,K" (meaning nitrogen (N), phosphorus (P) and potassium (K)) - different substances can change the colours slightly, although this is only temporary if you stop with the feed or change it to a different one..

if you really want the best for the plant, you can get a home testing kit for your soil, then get the correct feed to provide what's missing or lacking (if anything)

[pattricia 575]

Thank you for your interesting replies.