Overview & History
The Great Palm House stands as one of Dublin’s most striking examples of Victorian engineering. Rising 65 ft high, 80 ft wide and 100 ft long, the structure was born from destruction: a violent gale in 1883 shattered the original wooden glasshouse that had served the National Botanic Gardens since 1862. The Dublin Society quickly commissioned celebrated ironmaster Richard Turner to design a more resilient replacement.
Rather than building on site, Turner’s design was manufactured as a prefabricated kit by James Boyd & Son in Paisley, Scotland. The components cost £800 and were shipped to Ireland, where workers assembled the glasshouse over nine months between March and October 1884. Once completed, it quickly became a scientific and social hub, attracting Dublin’s elite and researchers alike. The National Botanic Gardens themselves trace their origins to 1795, when the Dublin Society purchased 19.5 hectares of land from the poet Thomas Tickell, establishing a living laboratory that would eventually house the Palm House.
Architecture & The 2004 Restoration
By the early 2000s, decades of weather exposure had taken their toll. More than 7,000 glass panes were breaking annually, iron columns were corroding, and the historic linseed-oil putty was failing. A comprehensive 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 cost €3 million and earned the Europa Nostra Medal and European Heritage Awards Medal in 2005, 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 protect the National Herbarium, a reference collection of approximately 20,000 dried plant specimens that has supported botanical research for centuries, including early studies on potato blight during 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.
- Weekday tours cost €5; Sunday tours are free.
- 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.
Plan to arrive early on weekends to secure a spot on the free guided tours, and bring a light layer – the heating system keeps the interior comfortably warm year-round, even when Dublin weather turns brisk outside.