Fact
Icy Veins (Oct 8): the Greenhouse Blueprint drops from Shadetooth, a boss in Excavation Site: Wetlands. A Greenhouse placed by a campsite spawns a planter box; plant a seed and the herb can be picked after 8 minutes. The Greenhouse lasts 15 minutes, like a Campfire, so it grows one seed. Seeds are looted while gathering herbs: Commonplace Herb Seeds (Peacebloom, Earthroot), Uncommon Herb Seeds (Silverleaf, Kingsblood) and Scarce Herb Seeds (Ghost Mushroom). The next tier, the Seed Hybridizer, needs Herbalism 300 and is expected to combine or multiply seeds; its source is unknown.