Upgrade Botany Charm through four ranks and it tops out at Botanist Lv4. The first rank costs 500z to craft, every rank after that is an upgrade. Some of the materials only come from Congalala, Guardian Rathalos and Nerscylla.
Rank by rank
Botany Charm IRarity 2
Botanist Lv1: One extra consumable herb item per gather.
Craftable · 500zBotany Charm IIRarity 4
Botanist Lv2: Additionally adds one extra consumable fruit, nut, or seed item per gather.
Upgrade from previous rank · 1,500zBotany Charm IIIRarity 4
Botanist Lv3: Additionally adds one extra consumable insect item per gather.
Upgrade from previous rank · 1,500zBotany Charm IVRarity 5
Botanist Lv4: Additionally adds one extra consumable mushroom item per gather.
Upgrade from previous rank · 3,000z