How does concrete’s pH level affect surrounding plants near outdoor sofas?

Concrete, a common material for outdoor sofas and garden furniture, has a high pH level due to its alkaline nature. When exposed to rain or moisture, concrete can leach lime and other alkaline compounds into the surrounding soil. This increase in soil pH can negatively affect nearby plants, as most vegetation thrives in slightly acidic to neutral conditions (pH 6-7).

Plants near concrete structures may exhibit stunted growth, yellowing leaves (chlorosis), or nutrient deficiencies, as high alkalinity reduces the availability of essential minerals like iron and manganese. To mitigate these effects, consider using barriers like plastic or gravel between concrete and soil, or opt for pH-balancing amendments like sulfur or organic compost. Selecting alkaline-tolerant plants, such as lavender or yucca, can also help maintain a vibrant garden near concrete furniture. Regular soil testing ensures optimal pH levels for plant health.