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 leaves that turn purple may be trying to tell you that there simply isnât enough phosphorus nearby to keep the plant healthy. Sometimes, in their rush to change their hydrangeaâs flower colors, gardeners may accidentally cause the pH to drop so low that other chemical compounds bind phosphorus.