The Woodland Gardens contain some of the oldest trees in Wales, interspersed with woodland shrubs from all over the world and sprinkled with wild flowers. Unique to Picton are the rhododendrons raised by their own head gardeners and many rare species of myrtles, embothrium and eucryphia. Other features include a maze, a fern walk and a re-landscaped dew-pond.

In the Walled Garden, the focal point is an elegant fountain , with the rose-strewn arches acting as a counterpoint. There are also beds of medicinal herbs, each labelled with their various remedies. A door leads through to a fernery with less hardy species of ferns.