Jungle Grass Seeds

Jungle Grass Seeds can be placed on Mud Blocks to grow jungle grass and make an artificial Underground Jungle. This grass will only spread when placed below 0ft. Like a natural Underground Jungle, an artificial jungle will become inhabited with Hornets and Man Eaters. It is possible to find rare items such as Nature's Gift and Cobalt Armor in a player-made jungle.

The only way to get Jungle Grass Seeds is to cut grass in the Underground Jungle. The seeds are extremely rare since you can pretty much make your own jungle with just one of them.