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.
The addition of lime to the soil around the hydrangea wonât change the flowerâs color overnight. Depending on the soilâs texture, it may take months or even up to three years, according to Reeves. Monitor the soilâs pH twice a year.
HYDRANGEA COLOR CHANGE: 1  WHITE HYDRANGEAS can NOT be changed to pink or blue by the grower. (The Almighty sometimes adds pink and red to blooms as they age). 2  If you live in a hot climate, it is unlikely you will ever see a true red hydrangea.