Hydrangeas are exceptional in that the color of their flowers can change depending on the availability of aluminum ions. Available aluminum ions make the flowers blue. Aluminum ions are most available ...
Bloom color is generally controlled by soil pH and aluminum availability. Only certain hydrangeas can change color, and some cultivars will stay white no matter what you do to the soil. Color shifts ...
House Digest on MSN
The unexpected fertilizer to use for stunning purple & pink French hydrangea plants
If you've always wanted pink and purple French hydrangeas but your plants stay stubbornly blue, try this soil amendment ...
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