Outdoor plant boxes are a fantastic way to enhance your garden or balcony, but many people make avoidable mistakes that can harm their plants. One common error is choosing the wrong size or material for the box, which can lead to poor drainage or root suffocation. Overwatering is another frequent issue, as it can cause root rot and attract pests. Neglecting proper sunlight exposure is also a mistake, as different plants have varying light requirements. Additionally, failing to use quality soil or overcrowding plants can stunt growth and reduce vitality. By avoiding these pitfalls, you can ensure your outdoor plant boxes thrive and bring beauty to your space.