The earliest evidence of gardening at Trenarth is the Grade-II listed garden wall which appears to date from the 18th century.
Three orchards are also marked on a 19th century estate map - none of which survive - although wild damson and hazel trees can be seen in hedges nearby still.
The large pine at the top of the drive is all that remains of an avenue formerly flanking the drive, and a photograph from the 1930s shows a line of cordylines “dripping dracaenas” marching across the lawn in front of the house. This at a time when the walled garden was used as a kitchen garden.
After the end of World War II, frames and greenhouses were built in the aforementioned walled garden, and a small nursery garden was run.
During the 1950s the then owners planted belts and copses for shooting, shelter and ornamental purposes, while the 1960s saw the planting of a new orchard and the yew hedges which form an important part of the walled garden today.
Together, these features provide an invaluable backdrop for a garden-in-the-making since 1993. With the exception of a few magnolias, camellias, hydrangeas and the orchard, all of the planting has been done in the last twenty years.
The entrance to the garden is via a drive flanked by camellias, backed by a beech walk, and all under planted with bulbs, hellebores, and varieties of cornus.