Treberfydd's grounds include the walls of an 18th kitchen garden, believed to have been built for the Regency villa which was knocked down to build the current house. Now Grade II listed, the garden walls provide shelter for Beacons Nurseries, which stocks a wide range of seasonal bedding plants, perennials and alpines. Fruit and vegetable baskets, hanging baskets and troughs can be made to order both for summer and winter.