What is the primary function of potassium in plant growth?

The primary function of potassium in plant growth is indeed improving root development. Potassium plays a crucial role in various physiological processes within the plant. Specifically, it helps regulate water uptake and maintains turgor pressure in plant cells, facilitating better root development and overall plant health. Strong root systems are essential for plants to absorb water and nutrients from the soil effectively, which in turn supports growth and development.

While potassium does contribute to overall plant health, including some aspects of photosynthesis and enzyme activation, its most significant role is related to enhancing root systems. This attribute is particularly vital for establishing plants and allowing them to cope with environmental stresses such as drought.