Shiverthorn is an herb that grows naturally on Snow and Ice blocks. It can be harvested with any weapon or tool, and can be planted manually with Shiverthorn Seeds, which can also be planted in Clay Pots and Planter Boxes.
Shiverthorn will always bloom after a period of growth, and unlike other herbs, remains in bloom permanently thereafter. Fully grown Shiverthorn emits a glowing particle effect. Harvesting Shiverthorn while in bloom drops 1-3 Shiverthorn Seeds in addition to the Shiverthorn item.