Overview & History
Ludwig Wittgenstein used to sit on the steps of the Great Palm House to write, during a Dublin winter in 1948–49; a brass plaque now marks the spot. It is a fitting detail for a building that has always been as much a refuge as a greenhouse – a warm, humid room to escape into when Glasnevin turns grey.
The 65-ft-high iron-and-glass structure was born from destruction: a violent gale in 1883 shattered the wooden glasshouse that had stood here. The replacement was manufactured as a prefabricated kit by James Boyd & Son of Paisley, Scotland, working from the designs of the great glasshouse-maker Richard Turner – though Turner himself had died in 1881 and never saw it built. The components cost £800, were shipped to Ireland, and were assembled over nine months between March and October 1884, with the flanking wings of the earlier house retained. The National Botanic Gardens trace back further, to 1795, when land at Glasnevin was bought from the poet Thomas Tickell and handed to the Dublin Society; the gardens now hold over 16,000 plant species.
Architecture & The 2004 Restoration
By the early 2000s, decades of weather exposure had taken their toll: iron columns were corroding, panes were failing, and the historic linseed-oil putty had given up. A two-year restoration (2002–2004), overseen by the Office of Public Works with engineering support from Arup, saved the structure. Every component was dismantled, labelled, repaired or recast, and treated with modern protective coatings. The project won a Europa Nostra award for conservation, recognising the Palm House as the last known prefabricated palm house of its era surviving in Western Europe.
Key architectural features include:
- Framework: A freestanding timber and wrought-iron structure with an eleven-bay triple-height central hall, flanked by single-storey wings. The base rests on a limestone rubble plinth with a granite sill.
- Lantern: A full-width domed lantern floods the interior with natural light, featuring nine-bay sides and three-bay facets that date to the original build.
- Cast-iron details: Ornate foliate capitals, perforated walkways and balustrades support the upper viewing levels.
- Boiler house: A three-storey masonry building at the rear houses the original heating plant and a lift shaft that provides access to the upper galleries.
- Climate control: A historic winch-operated ventilation system works alongside concealed heating pipes to maintain a stable micro-climate for tropical flora.
What to See Inside
Stepping inside the Palm House feels like crossing into a different climate. The subtle warmth from the hidden heating system creates a comfortable refuge regardless of the weather outside. Visitors can explore the space at their own pace or join a guided tour to learn about the building’s engineering and horticultural history.
Highlights to look out for:
- The central jardinière: A historic rotating plant stand that was originally designed to turn slowly, allowing plants to follow the sun’s path.
- Upper galleries: Accessible via the boiler house lift, these offer a bird’s-eye view of the canopy and the intricate ironwork of the lantern.
- Architectural craftsmanship: Keep an eye out for the perforated walkways, cast-iron columns, and the carefully restored glazing that balances safety with historic authenticity.
- Seasonal programming: The glasshouse occasionally hosts horticultural workshops and classical music recitals, blending nature with cultural events.
The Plant Collection
The Palm House is home to over 300 endangered plant species, including six that are extinct in the wild. The collection reflects both 19th-century acclimatisation experiments and modern conservation efforts. Notable specimens include:
- Tropical palms: Species such as Ravenala madagascariensis (traveller’s palm) and Caryota urens (fishtail palm) dominate the canopy.
- Cycads: Rare, slow-growing specimens like Encephalartos altensteinii showcase prehistoric botanical lineages.
- Citrus and coffee: Historic varieties including Coffea arabica and Citrus sinensis were once cultivated here for agricultural research.
- Bamboos and ferns: These fill the understory, adding texture and humidity to the rainforest environment.
The gardens also hold the National Herbarium and a museum collection of some 20,000 samples of plant products – fruits, seeds and timbers – that has supported botanical research for generations, including early studies on the potato blight behind the Great Famine.
Practical Information
Opening Hours
| Season | Mon–Fri | Sat–Sun |
|---|---|---|
| March–Oct (Summer) | 10:00 – 17:00 | 10:00 – 18:00 |
| Nov–Feb (Winter) | 09:00 – 16:30 | 10:00 – 16:30 |
The gardens and glasshouses are open year-round. The site is closed on Christmas Day.
Admission & Tours
- General entry to the gardens and glasshouses is free.
- Guided tours run daily at 11:30 and 15:00 and cost €5 (every day, including weekends).
- Groups of five or more should email botanicgardens@opw.ie to arrange a private session.
Getting There The Botanic Gardens are located 3.5 km north of Dublin city centre on Botanic Road in Glasnevin. Public transport options include Dublin Bus routes 46A and 123, and the Luas Red Line (Botanic stop). Limited on-site parking is available for a fee, with free spaces reserved for OPW staff and disabled visitors. Bicycle racks are provided near the main entrance.
Facilities & Tips
- A café, bookshop, free Wi-Fi, baby-changing facilities and wheelchair-accessible toilets are available on site.
- Strollers are welcome, but picnics, ball games and jogging are not permitted inside the glasshouse to protect the controlled environment.
- Assistance dogs are allowed. Drones are prohibited.
- Flash photography is discouraged to prevent stress to the plants.
- Free audio guides can be downloaded from the OPW website for self-guided visits.
- Book guided tours in advance during peak summer months via the National Botanic Gardens Eventbrite page.
Nearby Attractions
The Palm House is part of a larger historic glasshouse complex. Directly adjacent, you can explore the Cactus House to the west, the Orchid House (Teak House) to the east (home to the annual spring Orchid Fair), and the separate Curvilinear Range from 1848. The Aquatic House and Fern House are currently undergoing restoration.
For visitors extending their day, a short walk or bus ride leads to several other points of interest:
- Arbour Hill – A historic cemetery and museum commemorating leaders of the 1916 Easter Rising, located just 2.6 km away.
- Ardgillan Castle – A 19th-century castle set in extensive coastal gardens, ideal for a family outing further north.
- The Garden of Remembrance – A tranquil memorial situated a few kilometres east of the gardens.
Come on a cold, wet Dublin day and the Palm House earns its keep: the hidden heating holds a tropical warmth year-round, so the worse the weather outside, the better the argument for stepping in. Entry is free; only the guided tours cost anything.