Before Sir Walter Raleigh's introduction of the potato to the British Isles, the Scots' main source of carbohydrate was bread made from oats or barley. Wheat was generally difficult to grow because of the damp climate.
Before Sir Walter Raleigh introduced potatoes to the British Isles, the Scots' primary carbohydrate source was bread made from oats or barley. Wheat was challenging to cultivate due to the damp climate.