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.
Mix 1/4 cup of aluminum sulfate into 1 gallon of water in a watering can to create a soil drench for an already established plant, like a hydrangea, that needs a decreased pH. Pour the mixture around the root zone of the plant once a week, beginning in early spring until bloom and again in the fall.