已对照游戏内数据、官方开发直播与补丁说明核验，
已针对 Preludes 15 人工核实。
食材 · Common
腐化芽民头顶的寄生藤须，Neath'uns 内击败 Rotted Sproutling 等敌人掉落；需先完成废熊寓言解锁地城。P15 暂无合成用途。
The Neath'uns · Complete The Waste Bear fable; clear Sproutling groups each run
The Neath'uns · Same dungeon loop; spear variant shares drop table
The Neath'uns · Kill Swampsprout corrupted Sproutfolk on dungeon routes
The Waste Bear fable · Opens Neath'uns portals before any frond farm
以下路线来自社区整理与攻略汇总，掉落率请在游戏内核对。
腐化芽民头顶的寄生藤须，Neath'uns 内击败 Rotted Sproutling 等敌人掉落；需先完成废熊寓言解锁地城。P15 暂无合成用途。
Best farm for Rotted Frond: hunt corrupted Sproutfolk inside The Neath'uns after completing The Waste Bear fable (dungeon unlock). Rotted Sproutling packs give the steadiest foe drops per community catalog; Rotted Sproutling (Spear) and Rotted Swampsprout share the same loot table. Pair with Neathcap Amber Deposit loops in the same dungeon. catalog notes the frond currently serves no crafting purpose in Preludes 15.
Foe: Rotted Sproutling — The Neath'uns — primary community catalog drop
Foe: Rotted Swampsprout — corrupted Sproutfolk — community-verified
Site guide: Neath'uns dungeon — Rotted Sproutling listed as standard enemy
同类别材料横向对比，便于判断稀有度与主要掉落来源。
| 物品 | 稀有度 | 主要来源 | 刷取路线 |
|---|---|---|---|
| 腐叶当前 | Common | Foe: Rotted Sproutling — corrupted Spro… | 有 |
| 蘑菇精华 | Uncommon | Foe: Kabocha | 有 |
| 仰光球茎 | Uncommon | Foe: Kabocha | 有 |
| 织工之眼 | Uncommon | Foe: Etheldred The Weaver — Glades of A… | 有 |
| 涅丝帽 | Uncommon | Container: Amber Deposit — The Neath'uns | 有 |
| 女王之愚 | Uncommon | Gathering red flowers in Midrath | 有 |
| 魂灭草 | Uncommon | Overworld plant nodes in Midrath | 有 |
| 鬼火叶 | Uncommon | Foe: Will-o-wing — kill on death | 有 |
| 胆汁囊 | Common | Foe: Etheldred The Weaver — Glades of A… | 有 |
| 盐沫草（Brinefloss） | Common | Coastal and waterside nodes in Midrath | 有 |
| 露孢菇（Dewspore） | Common | Overworld spore nodes — damp/shaded are… | 有 |
| 火菌 | Common | Overworld fungus nodes — volcanic/heate… | 有 |
| 格林舌草（Grynnetongue） | Common | Overworld plant nodes in Midrath | 有 |
| 圣歌玫瑰 | Common | Overworld flower nodes in Midrath | 有 |
| 杰登滴露 | Common | Mushroom nodes in Neath'uns Dungeon | 有 |
| 安眠百合 | Common | Gathering blue flowers throughout Midra… | 有 |
| 摩拉之吻（Mora's Kiss） | Common | Overworld flower nodes — blossoms at da… | 有 |
| 哀钟花（Mourning Bell） | Common | Overworld plant nodes in Midrath | 有 |
| 夜影墨 | Common | Vendor: Scribe supplies | 有 |
| 桑杰利亚草 | Common | Overworld plant nodes in Midrath | 有 |
| 教团少女草 | Common | Overworld plant nodes in Midrath | 有 |
| 颂歌之趾（Toe of Ode） | Common | Foe: Discharged Nimrod | 有 |
| 泣露花（Weepin' Dris） | Common | Overworld plant nodes in Midrath | 有 |
| 维维特木树液 | Common | Container: Amber Deposit | 有 |
| 龙草（Wyrmwort） | Common | Overworld plant nodes in Midrath | 有 |