Pine Bark Fines improves plant growth and performance. It provides excellent water retention and improves oxygen levels in the soil. It retains nutrients over a long period of time, absorbing and storing an increased amount of nutrients, releasing them at an increased rate. Pine bark fines benefit soil and plants by retaining moisture, protecting plants from extreme cold or heat, and preventing the spread of soil-borne diseases. The Pine Bark is especially beneficial to acid-loving garden plants. It also adds aluminum to the soil, promoting green, leafy growth and can control weeds and erosion.