These are ready-to-use plant grow bags, filled with our AWIN Potting Mix - General purpose. The bag is designed to be the planter pot. AWIN Grow Bags are very convenient for growing of vegetable ornamental plants. They can be re-used after a crop, by topping up the Potting mix & treating for pestsdiseases, if required. • The bags are made from UV resistant, co-extruded (black inside and white outside) polythene that has an average life span of 3 years. The bags are double gazetted & heat sealed.