Video answer: Tutorial | sea grass farm | minecraft bedrock edition how to
Top best answers to the question «Minecraft how to grow underwater grass»
Seagrass spontaneously generates by applying bonemeal underwater. Applying bonemeal to seagrass will cause it to increase in height, similar to normal grass. This bonemeal can be applied by a dispenser, but the player can only obtain the item by breaking it with shears, making fully automatic farms impossible.
Video answer: Minecraft: grass growth tutorial