Blue Hydrangea - Knowledgebase Question

Southington, CT
Question by bobjoymcmill
August 4, 2007
My endless summer blue...are turning pink.They were just planted 6 wks ago.How can I keep them Blue?

Answer from NGA
August 4, 2007


Endless Summer produces spectacular pink or blue blooms depending on the makeup of your soil. If you don't know the pH of your soil, ask your garden center for a soil testing kit. Alkaline soils (pH 6-7) will produce pink blooms. More acidic soil (pH 5-5.8) will turn your blooms blue. To lower the soil's pH, add a soil acidifier to the soil. Follow the directions on the package to encourage blue blooms throughout the season.

Since Endless Summer Blooms on new wood, removal of spent flowers will encourage rebloom.

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