https://www.alnwickgarden.com/the-garden/poison-garden/

https://en.wikipedia.org/wiki/Alnwick_Garden

The Alnwick Garden is a complex of formal gardens adjacent to Alnwick Castle in the town of Alnwick, Northumberland, England. The gardens have a long history under the dukes of Northumberland, but fell into disrepair until revived at the turn of the 21st century. The garden now features various themed plantings designed around a central water cascade. The revival of the gardens led to several public disputes between the Duchess of Northumberland and various garden experts concerning preservation and the use of public funds.[1] The garden now belongs to a charitable trust, which is separate from Northumberland Estates, although the 12th Duke of Northumberland donated the 42-acre (17 ha) site and contributed £9 million towards redevelopment costs.

of course… this is a bit tongue and cheek -

https://www.who.int/news-room/fact-sheets/detail/natural-toxins-in-food

But if you combine the WHO toxins… the metaphors is delicious!