In the first area, just north of the large rocks lies a secret entrance leading to an Abandoned Mine. Don’t bother exploring it for now since the enemies here can easily one-shot your characters at this point. Just take note of its location for now so you can explore it later.
With that said, just follow the path like before. Once you’ve reached the spring, replenish your HP by drinking from it. (You can conveniently fight a few battles to farm EXP if you want.) Continue to the left to trigger a brief conversation with Cyuss. Once done, grab the ?Herb along the way.
Continue to the peak and get the Rose Hip to the right. Take the path to the left then follow the path down the mountain.
Pick up the Wolfsbane from a bush along the way. Continue going down until you reach the world map again. Don’t forget to save your game. Just follow the road again until you reach Portmith.