10Kg Bag. The Fast Grow Chicken Manure Fertiliser is a natural fertiliser that encourages more worm activity, improves your soils quality by banding soil particles together and helps plants to grow better in low light and extremely wet/dry conditions. This fertiliser is ideal around root crops such as potatoes as it helps to establish strong root systems, foliage and more fruit and vegetables. Also helps your plants get the necessary doses of calcium they need and reduces aluminium toxins in your soil. It is quite strong so it should be used accordingly to the instructions.