This is a good one. My initial thought was that this plant can't be growing around here. Then I did a bit of research and found out that one of the species actually grows here and is used in the treatment of depression as you said. I wrote a little piece on my research here https://peakd.com/hive-141827/@gentleshaid/st-johns-wort-antidepressant-beyond-anecdotal-evidence
A brief actionable points from the write-up
- There are different species of St John's wort, which species grow in your area?
- Apart from antidepressants, the species that grows in Nigeria also has antiviral potential as found out in some research. Does this also applies to other species?