Ulster Tara Potatoes This page first published: Apr 7, 2005 · Modified: Jun 1, 2018 · by CooksInfo. Copyright © 2020 · This post may contain affiliate links · This blog generates income via ads · Ulster Tara Potatoes are round to oval shaped, with light-buff skin and white flesh. Good flavour. Some report that the potato can develop some black spots when cooked. Does well in acidic soil. Storage Hints Stores well.