Product Description Bonsai are facinating and interesting plants that portray nature in miniature, seeking to capture the spirit of the tree and its surroundings. Westland Bonsai Potting Mix is formulated to give the correct balance of drainage, water retention and aeration required to develop a healthy root system, which is essential for healthy Bonsai growth. This product also contains SERAMIS clay granules that work by absorbing water and releasing it back to the plant when needed for optimum water and nutrient avalibility. Finally, this product also contains added wood fibre the creates an open structure for improved areation, drainage and water management. This is a specialist blend that can be used by anybody who wants a strong and healthier plant that is provided with optimum water and nutrient availability. The added SERAMIS granuals do a fantastic job at regulating the plants water intake to ensure optimum water and nutrient availability. The added wood fibre creates the open structure for improved aeration, drainage and water management. This 4L bag will fill a 14cm pot.