Waterleaf Seeds are a type of seed that can be obtained from harvesting Waterleaves while they are blooming or using the Staff of Regrowth on naturally grown Waterleaves while they are fully grown. On the Desktop version, Console version, Old-gen console version, and Mobile version, a Waterleaf plant only blooms during Rain, whereas on the Nintendo version, it only blooms when submerged in water. Each plant drops 1–3 Waterleaf Seeds when harvested while blooming.
Waterleaf Seeds can be placed on Sand and Pearlsand Blocks, empty Clay Pots, or any types of Planter Boxes(Desktop, Console and Mobile versions), even inside water or honey, and will grow into harvestable Waterleaves. They will grow anywhere, not just in the Desert, but will only yield seeds when blooming.