My Blue Hydrangeas Turned Pink

These hydrangeas are pink because the soil is on the alkaline side.

If you want blue hydrangeas the soil needs to be on the acid side, and this is what you can purchase to help keep them blue.

Believe it or not, it is a common problem in many areas around Birmingham. The good news is that there is a solution to have them blue again next year. If they are pink and in bloom, there is nothing you can do about it this year. But you can help ensure their giving you a nice blue color next year if you change the pH to a more acid profile. I think the easiest solution is to apply a soil acidifier according to label directions. Follow them carefully, and a more than recommended application will not make them bluer. It is better to do repeated applications than to increase the application amount. So good luck, and if you want blue hydrangeas, use a soil acidifier. Now if you want to keep the pink one pink, I suggest a fall application of 1/3 cup of pelletized lime around each plant. This will help to adjust the soil pH on the basic side, and that gets beautiful pink florist type hydrangea blooms.


John Floyd

John Floyd has been gardening--and learning about Birmingham area gardening--for more than 30 years. In addition to his day-to-day experience, John has degrees in horticulture from Auburn and Clemson Universities and was Editor-in-Chief of Southern Living.

2 thoughts on “My Blue Hydrangeas Turned Pink

  1. My basil and perennials are being eaten by very small beetle looking insects. Insecticidal soap doesn’t seem to be affecting them. Any suggestions on what I can use that is also safe for good insects?

    • Not sure but I would try dipel or sevin. If this does not control them I would take the insect to the Hanna Center at the Birmingham Botanical Gardens or send me an image- john

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