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Optigrow air root pruning pots are an innovative new design of plant pot that increases plant growth and decreases the need for re-potting. The novel, perforated 'egg-carton' like construction deflects the growing root tips into holes in the side wall and thence into the air. This stops their growth and prevents roots from spiralling around the pot sides and becoming "pot bound". In response to this "air pruning", the plant sends out more lateral roots forming a healthier, highly branched root system, that takes advantage of every bit of space in the pot. Plants grow faster and require smaller pots for any given plant size, meaning less work and larger healthier plants. To plant out or pot on the plant, simply remove the fastening screws and unwrap the pot from around the plant, minimising disturbance to the rootball and revealing roots outspread and non spiralled. Plants therefore transition, without the usual set back associated with re-potting or planting out from standard pots. The pots are also excellent tools for easily creating your own bonsai plants; the innovative air pruning system means the roots are pruned, resulting in the gradual miniaturisation of the plants' leaves, branches and trunk, and so over time, the plant will bonsai itself whilst remaining healthy. The pots come in kits with walls, bases and fastening screws and can be assembled in seconds with no need for tools and filled with your desired potting medium. They are made from high-density polyethylene (HDPE) with an ultraviolet protective screen that allows them to be re-used time and time again. At our nursery in Ireland, Derry Duff Organics has been using these pots for several years with such positive results that we have now adopted Optigrow pots as standard. Optigrow pots are available in sizes of 3.9 litres, 7 litres, 10 litres, 12 litres, 19.5 litres and 30 litres.