I was foraging with my monk skill 50 max and 75 bard skill 55 max only pulling up roots, none of the rares. So i brought in my level 100 monk with skill 100. I foraged on all 3 character's. The only one pulling up rare forages was my level 100 skill 100 monk. Took a couple hours of foraging to get the drop. Got 3 regular gold nuggets before the fools gold one
So if your not of a higher skill level you might need a ranger or druid to help you. Good luck!