Author Archives: Jinsheng Huang

About Jinsheng Huang

Jinsheng Huang is a research scientist in the Environmental Horticulture Department at the University of Florida. You can eMail him at

Understanding Plant Nutrition: Limestone and pH

In last month’s article, we stated that cation exchange capacity (CEC) does not play an important role in pH, calcium and magnesium buffering. The question should then be asked: Is growing in a soilless media similar to hydroponics when it comes to pH or nutritional management? Growing in a soilless root medium is not the

Understanding Plant Nutrition: Limestone, Calcium And Magnesium

The reason for adding limestone to a container media, besides pH control, is to supply calcium and, depending on the limestone, magnesium. In this article, we will discuss the nutrient content of different types of limestone and how limestone influences calcium and magnesium nutrition.  Limestone Nutrient Content There are four types of carbonate-based limestone that