How does the mineral composition of stone affect plant health in outdoor tree boxes?
The mineral composition of stone used in outdoor tree boxes plays a crucial role in plant health. Stones with high calcium content, such as limestone, can raise soil pH, making it more alkaline and potentially limiting nutrient uptake for acid-loving plants. Conversely, porous stones like lava rock improve drainage and aeration, preventing root rot. Minerals like potassium and magnesium, found in certain rocks, slowly release essential nutrients into the soil, promoting healthier tree growth. However, stones with heavy metals or high salt concentrations may harm plants. Selecting the right stone type ensures optimal soil conditions, supporting robust root development and long-term tree vitality in urban environments.
