Medieval "Chemists" found in Scotland

Archaeologists have discovered a 700-year-old chemists, an herb garden, which supplied the Soutra Hospital near Edinburgh, Scotland.

The garden in the Lammermuir Hills contained 200 plants used to create remedies for a variety of illnesses.

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aaaaaaaaaaaaaaand???? What 200 plants were used? Where is it in Edinburgh? How did they find it? How close is it to the current medical school? Okay, I want more details!