How does granite’s mineral composition affect plant nutrition in outdoor pots?
Granite, a common igneous rock, plays a significant role in plant nutrition when used in outdoor pots. Its mineral composition, primarily feldspar, quartz, and mica, slowly weathers over time, releasing essential nutrients like potassium, calcium, and magnesium into the soil. These minerals help regulate soil pH, creating a more alkaline environment that benefits certain plants. However, granite's slow weathering rate means nutrient release is gradual, which can be both an advantage and a limitation. Additionally, granite's porous nature improves soil aeration and drainage, preventing root rot. Understanding these effects can help gardeners optimize plant health in granite-based potting setups.
