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From 2020, Hill and Sons have introduced new grey recyclable pots into their production streams. These new Thermoform pots, supplied by leading pot suppliers Modiform, are already in use on the nursery. "Closing the material loop" is a long term commitment of Hills with their suppliers. Traditionally, waste processing plants have been unable to accept black pots from nurseries and garden centres as their carbon black colour renders them undetectable by the infra-red sensors and therefore cannot be channelled into recycling material.