Am not sure if helpful, or if this would be somewhere you could visit for reference.
The Alnwick Victorian poison garden is fascinating and perhaps even has ideas for you.
https://www.alnwickgarden.com/the-garden/poison-garden/
https://en.m.wikipedia.org/wiki/Alnwick_Garden
Hope this helps. Am hoping to get to visit one day.
Am not sure if helpful, or if this would be somewhere you could visit for reference.
The Alnwick Victorian poison garden is fascinating and perhaps even has ideas for you.
https://www.alnwickgarden.com/the-garden/poison-garden/
https://en.m.wikipedia.org/wiki/Alnwick_Garden
Hope this helps. Am hoping to get to visit one day.