As requested by Espen204 here's an updated map with Oleander Sage locations if you guys/gals would like any other additions please feel free to send me a message. Happy trails y'all! :
Plants & Herbs Location Guide - RDR2.org
Oleander Sage's location for today's challenge : r/RedDeadOnline
RDR2 Online - Agarita and Blood Flower nighttime locations Day 2 by Finn Pup
Sage location in Red Dead Redemption 2 | Shacknews
RDR2 Oleander Sage Location | Map | Where to Find - GamePlayerr
Sage location in Red Dead Redemption 2 | Shacknews
Finally found some Oleander Sage in my yard...time to make some poison arrows : r/RDR2
Plants & Herbs Location Guide - RDR2.org
Red Dead Redemption 2 Where to find Oleander Sage
Plants & Herbs Location Guide -
Oleander Sage | Red Dead Wiki | Fandom
Where to Find Oleander Sage in Red Dead Redemption 2 - Gamepur