high herb population
High Density: They are thickest at the top of the mountain by the Chaos Tear public event.You can also find Water Toads when in Highsteppe at the entrance to Lamavora, and when you're coming out of Highsteppe city if you hug the right mountain wall you will find a patch of Water Toads along that right wall.
Very High Density: Found everywhere throughout Highsteppe.
Medium Density: A few can be found in the cave in the center of Highsteppe, one or two can sometimes be found if you walk through the cave near Highsteppe and the mound on the opposite side of Highsteppe sometimes has some mixed within the Queens Ears. There is one more spot near the Highsteppe World boss, it's inside of the small stone walls on the edge of the map.
Sparse: Found in two areas, one when coming out of Highsteppe is to the left near the Highsteppe World Boss, they are mixed in with all of the elite mobs near the edge of the map. The other spot is the opposite direction, it's to the right when walking out of Highsteppe, follow the edge of the map, the Wilting Suns are behind a large mound.
Medium Density: Found in the cave in the center of Highsteppe, also found in Sarrows Cave.(located between the Rainforest and Lamavora entrances leading out of Highsteppe.)
High Density: Found in Sarrow's Cave. (located between the Rainforest and Lamavora entrances leading out of Highsteppe.)