Bloem Bagz Mini 1.5 Gallon Herb Planter Grow Bag - Walmart.com
At the current moment, there is no renewable way to get Herb Bags. Adding them to the Wooden or Iron Crate loot pool would be a great addition! : r/Terraria
Resealable Herb Storage Bag | Smell proof, Odor proof & Zip Lock – Lock-Box - Ultimate Stash Box