The free scheme gives gardeners the chance to dispose of or swap their plastic gardening pots or trays. Any pots left at the end of the month will be recycled commercially or given to growers for re-use.
General manager Norma Moore said: "Gardeners tend to collect plastic pots when they buy new plants. While they can re-use some in their own gardens, they normally have more than they need.
"Our idea helps save resources and gives gardeners a chance to re-use and recycle their unwanted plastic pots, and also any seedling or young-plant trays."
The scheme is one of Monkton's green gardening and recycling initiatives taking place this year, with various green-themed displays and events planned. Where possible, the centre has pledged to cut its level of plant and product miles by reducing the distance they travel.