Botanist - gkazan/ZAWA GitHub Wiki
Botanists are a type of NPC. In version 2.0, botanists were added to give players with pre-2.0 worlds a way to get the new plants.
By default, the only vanilla biome botanists will spawn in is mutated plains. With additional biome mods installed, they will spawn in flowered or flower-themed biomes, like Biomes O' Plenty's flower fields and cherry blossom groves.
Players can trade coins to botanists for decorative plants and coral. They use the vanilla villager trading system, so prices on their trades will vary.