A Univ. of Nev. School of Medicine, Family Medicine answered. No, there are times where you can have small releases of bacteria into your bloodstream that last only a few minutes, for example, after you have your teeth cleaned.
To change the color of your hydrangeas, add the following to the soil: CHANGE TO PINK. For hydrangea blooms to be pink, the plants must not take up aluminum from the soil. If the soil naturally contains aluminum, one must try to keep it away from the hydrangea's system. Following are a few tricks that might work:
Mophead hydrangeas are a must-have shrub for shady spots in Southern gardens. Learn ways to make them bloom every year and how to change their huge flowers from pink and red to blue and purple. Helping You Become a More Successful Gardener