At a glance
Treborth Botanic Garden (LL57 2RQ) is Bangor University's free 52-acre garden on the Menai Strait — native Welsh plants, glasshouses (weekdays term-time), woodland walks, Menai views. Open daily dawn–dusk. Free car park on A487. 3 miles from Bangor station. Dogs on leads. Glasshouses have tropical and Mediterranean collections.
About Treborth Botanic Garden
Treborth occupies a former 19th-century estate on the south shore of the Menai Strait — the tidal waterway that separates Anglesey from the Welsh mainland. Bangor University took over the site and developed it as a botanic garden from the 1960s onwards, assembling collections that reflect both the academic interests of the university and the remarkable flora of Wales itself.
The garden's central distinction is its commitment to native Welsh plants. Wales has a rich and varied flora — from the arctic-alpine species of the Snowdonian summits to the coastal plants of the Llŷn Peninsula, from the ancient woodland species of the Atlantic oak forests to the limestone grassland plants of the Great Orme. Treborth has assembled representative and research collections from across these habitats, making it one of the few places in Britain where the full range of Welsh native flora can be seen in a garden setting.
The glasshouses at Treborth extend this collection into the tropics and Mediterranean — plants that thrive in conditions that could never be sustained outdoors in North Wales. The contrast between the free-flying snowdrop and bluebell of the Welsh woodland outside and the exotic humidity of the tropical house inside gives visitors a sense of the extraordinary range of plant life that the world's climatic zones support.
The setting on the Menai Strait adds a particular quality to every visit. The sound of the tidal water, the views across to Anglesey, and the sense of being at the meeting point of land, freshwater and sea give Treborth a character that purely inland botanic gardens lack.
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Frequently asked questions
Treborth Botanic Garden is the official botanic garden of Bangor University, established on 52 acres of former estate land on the shore of the Menai Strait. The garden has been developed since the 1960s and has a particular focus on native Welsh plants and their conservation — one of the few UK botanic gardens to make Welsh flora a primary collecting and research priority. Entry is free and the garden is open daily.
The Treborth glasshouses contain tropical and subtropical plant collections, including a tropical house with plants from humid equatorial regions, a Mediterranean house with plants from dry summer climates, and specialist collections used for teaching and research. The glasshouses are open during weekday university term times — at other times the outdoor garden remains open but the glasshouses may be closed. Contact Treborth for current access arrangements.
Treborth has assembled one of the most comprehensive collections of native Welsh plants in Britain. The garden includes rare plants found in limited locations in the wild — some are grown at Treborth as part of conservation and ex-situ preservation programmes. Visitors can see representative examples of Welsh woodland plants, coastal species, upland and mountain flora, and the unusual species associated with Wales's limestone pavements and ancient grasslands. Seasonal interest includes wildflower meadow sections.
Treborth sits on the shore of the Menai Strait and the garden has views across the water to Anglesey, with the Britannia Bridge visible to the north. The garden extends down to the strait's edge in places, giving direct water views. The combination of garden planting, ancient woodland and tidal strait creates an atmosphere quite different from inland gardens — the sound and smell of the sea is present throughout.
Treborth is on the A487 between Bangor and Y Felinheli, approximately 3 miles south-west of Bangor city centre and rail station. The postcode LL57 2RQ takes you to the entrance. By bus, services from Bangor to Caernarfon pass along the A487 — alight at the Treborth stop. Free on-site parking is available. The garden is accessible from the Bangor end of the Menai Strait on foot via the strait-side path.