Rosemary

Rosemary was a type of plant, commonly used as a herb in cooking.

In Castrovalva, the Fifth Doctor detected "just a hint" of rosemary in a tonic he was given from the pharmacist Mergrave. (TV: Castrovalva)

In England in 1738, the Sixth Doctor used rosemary to counteract the effect of Grel particles. (AUDIO: The Doomwood Curse)

A rosemary plant grew outside the student union of St Luke's University. Bill Potts thought that it smelled "amazing". She was later pleased to find some in the garden on a human colony planet, remarking that they smelled like home. (TV: Smile)