comicallymacabre:ultrafacts:Hydrangea macrophylla flowers can change color depending on soil aci
comicallymacabre: ultrafacts: Hydrangea macrophylla flowers can change color depending on soil acidity. In acid soils, chemical reactions occur in the soil that make aluminium available to these plants, turning the flowers blue. In alkaline soils, these reactions cannot occur and therefore aluminium is not taken up by the plant. As a result, the flowers are pink. (Fact Source) For more facts, follow Ultrafacts I’ve always found this neat. -- source link
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