This is a partial list of public gardens in Mexico:
Mexico City
https://aguida.com/en/los-jardines-botanicos-en-mexico/
Oaxaca
https://www.inspirock.com/mexico/san-andres-huayapam/la-orquideario-encantada-a6144450503
Ethnobotanical Garden – Oaxaca
Puerto Vallarta
https://www.gardendesign.com/mexico/oaxaca-ethnobotanical.html
San Miguel de Allende
Stirling Dickson Orchid Garden
http://elcharco.org.mx/Ingles/index.html