Available material: a few tubers only
Approx. 250 cultivars.
Name and address: I. Matthes, von-Galen-Str. 41, D-47608 Geldern, Germany
Home page: www.imatthes.de/ (currently off-line, in German, click 'Kartoffeln' and 'Sorten')
alternative link from Arche Noah
Mr Langford's potatoes
Approx. 180 cultivars.
Name and address: David Langford, Lissadell House, Sligo - Leitrim, Ireland.
The Lissadell House and David Langford received for their heritage potatoes the EirGrid Euro-Toques Food Award, which acknowledges food producers or individuals who have made an outstanding contribution to Irish food.
Related page: Agricultural Biodiversity Weblog
Home page: Spuds and Boxty in Sligo and Leitrim at Facebook.
De Tuinen van Weldadigheid
Approx 120 cultivars.
Name and address: L. Sijens, Hospitaallaan 48, Veenhuizen, the Netherlands
potato collection: https://winkel.detuinenvanweldadigheid.nl/collections/aardappelen