On Sunday 3rd May 2026, Treffgarne Hall garden will be opening from 1pm until 5pm for the NGS at Treffgarne Hall, Treffgarne, Haverfordwest, Pembrokeshire, Wales, SA62 5PJ. Stunning hilltop location with panoramic views: Grade II listed Georgian house (not open) provides formal backdrop to garden of four acres with wide lawns and themed beds. A walled garden, with double rill and pergolas, planted with a multitude of borderline hardy exotics. Summer border, gravel garden, heather bed, stumpery. woodland area, and rose garden. There will be a plant stall. Planted for year-round interest. Directions: 7m N of Haverfordwest, signed off A40. Go up through village & follow road round sharply to left, Hall ¼m further on L. What3words app:doubt.thrones.awesome. For more information and to book tickets, please click here.