This page lists all the places that I have personally seen Poncirus Trifoliata  flowering or fruiting in Northern Europe, outside the normal citrus-growing range.Those in italic script are reports from readers of this page, but which I have not yet seen for myself.
ENGLAND
1.Polesden Lacy (National Trust property) near Bookham, Surrey. In the formal gardens.STREETMAP

2.
The Valley Gardens near Windsor, Berkshire. STREETMAP

3.Leatherhead Crematorium garden, Surrey. Large specimen near the main building.
STREETMAP    SEE PHOTOS

4.
Ranelagh Gardens, London. Next to where the Chelsea Flower Show is held. STREETMAP

5.Coleshill, Buckinghamshire. At entrance to private house.
STREETMAP

6.Denham Green, Buckinghamshire. In my back garden!
STREETMAP (Please E-mail me if you wish to visit.)

7.
Greys Court (National Trust property) near Henley, Oxfordshire. In the white garden.STREETMAP

8.
University of Surrey, Guildford.
STREETMAP  Exact location is due South of the Accommodation Office, labelled 14 on the CAMPUSMAP  I visited this site at flowering time in mid-May. SEE PHOTOS

9.
At the  west entrance to the small public park between Northampton Road and Skinner Street in Clerkenwell, London. The plants are to the left of the entrance growing up against the railings.
STREETMAP  I visited this site in April and found a group of about eight plants, several with flower buds developing. SEE PHOTOS There were two more plants further along the railings on the north side of the park.

10.
Royal Botanic Gardens, Kew. Large plant in bed 461-05 in The Berberis Dell. From Victoria Gate, head towards the flag pole but turn right just before the small hill on which the pole stands. Plant is then on the right. There is also a group of three young plants just before the orangery, coming from the main entrance. STREETMAPSEE PHOTOS

11.Sunningdale Garden, Grange Court, near Westbury-on-Severn, Gloucestershire.
This garden is open to the public on dates listed at
The National Gardens Scheme      STREETMAP     SEE PHOTO

12. Chumleigh Gardens, Burgess Park, London SE5 0RJ. Reported by the Gardens and Education Officer of the Parks Ranger Service of Southwark Council. Click here for more info.

13. Exeter University campus, Exeter, Devon.  Its position is on the lawn at the junction of North Park Road and the slip road that leads up to the computer building, alongside Laver.

14. Hillier Gardens and Arboretum, Jermyns Lane, Ampfield, Hampshire. There are two mature trees, planted 1976, in Brentry Woodland - the other side of the road from the main gardens. STREETMAP  SEE PHOTOS

15. Exbury Gardens, Hampshire - home to one of the finest collections of rhododendrons in the world. The Poncirus is north-west of the tea-rooms in the garden, in a lawn close to the path as it heads south. STREETMAP   SEE PHOTO

16.
University of Oxford Botanic Garden, Oxford. In the main walled garden, head towards the lower garden but take the left path just before the exit through the wall. The plant is on the left past an old Mulberry tree. Large specimen planted 1920. SEE PHOTOS

17.
University of Cambridge Botanic Garden, Cambridge. Aproximately at grid position P9 of the gardens map

18.
University of Leicester Botanic Garden, Oadby, Leicester. Against the wall at one corner of Beaumont Hall. SEE PHOTO

19. The RSBP headquaters in Sandy, Bedfordshire. The plant is at the rear of the main house. SEE PHOTOS

20. Richmond upon Thames. The Terrace Gardens.  SEE PHOTO

21. Eltham Palace, south-east London. SEE PHOTO
page updated  01 August 2005
I have tried to accurately position the arrows on the street maps below, but plants do die, or get moved or removed, so please don't blame me if you can't find them!
Do you know of fruiting plants of Poncirus trifoliata in Britain? I will be happy to list them on this page.
DENMARK
1.
Copenhagen Botanic Gardens. In bed Q1, by the fence and away from the footpath. Ask for directions at the information desk - but it is approximately the western-most corner of the gardens. SEE PHOTO  Just beaten by Edinburgh in the 'furthest north' competition!
WALES
1.
Dyffryn Gardens, a few miles west of Cardiff, Wales. From the centre of the main herbaceous border, take the path towards the
Pompeian Garden. The low-growing, but fruiting, Poncirus is on the left, among some perennial plants.
SEE PHOTO . There may be other examples in the large arboretum, but I have not yet had an opportunity to explore fully!
SCOTLAND
1. Edinburgh Royal Botanic Gardens. An excellent specimen on a small crag in bed R22 of the rockery. SEE PHOTOS . Does anyone know of an outside fruiting plant further North than this one?
IRELAND
1.
Ilnacullin Gardens, Garinish Island near Glengariff, County Cork. In the walled garden.
SPAIN
1. Madrid is not a citrus growing area, so it is worth mentioning that there are two fruiting plants in the Royal Botanic Gardens

Click the following link for my new page about Poncirus locations in USA .
Click the following link for a German web-site listing Poncirus in Germany, Austria and Switzerland 
FRANCE
1. Jardin Botanique in Tours, Loire. The botanic gardens are at the western side of central Tours. The plant is in a lawn near the middle of the garden. SEE PHOTOS