The Chelsea Physic Garden was established as the Apothecaries' Garden in London, England, in 1673 by the Worshipful Society of Apothecaries to grow plants to be used as medicines. This four acre physic garden, the term here referring to the science of healing, is among the oldest botanical gardens in Britain, after the University of Oxford Botanic Garden. Its rock garden is the oldest in Europe devoted to alpine plants and Mediterranean plants. The largest fruiting olive tree in Britain is there, protected by the garden's heat-trapping high brick walls, along with what is doubtless the world's northernmost grapefruit growing outdoors. Jealously guarded during the tenure of the Worshipful Society of Apothecaries, the Garden became in 1983 a registered charity and was opened to the general public for the first time.
The garden is a member of the London Museums of Health & Medicine. It is also Grade I listed in the Register of Historic Parks and Gardens of Special Historic Interest in England by English Heritage.