Kelp
Tall underwater plant that grows upward through ocean water columns, harvestable for dried kelp food and fuel, and useful for converting flowing water into source blocks.
Description
Drying kelp in a furnace produces dried kelp, which restores 1 hunger point per piece. Compact dried blocks made from nine pieces restore 0.4 saturation each and are one of the most fuel-efficient items in the game — one block smelts 20 items. The plant also composts at a 30% rate per piece.
Automated farms are simple to build: place one piece on the ocean floor near an observer and piston, which breaks the top segment each time it grows. It is also used as a visual element in ocean and underwater room builds.
Java & Bedrock Guide
How to farm and dry Kelp in Minecraft
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1
Find kelp in the ocean
Kelp grows in warm, lukewarm, cold, and deep ocean biomes, forming tall green columns from the seabed toward the surface. Search shallow coastlines first — kelp is easiest to reach there.
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2
Harvest the whole column
Break the lowest kelp segment and every block above it drops as an item, so a single hit can collect a full 2–26 block column at once.
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3
Smelt kelp into dried kelp
Place raw kelp in a furnace, smoker, or campfire to make dried kelp, a food item that restores 1 hunger point and stacks to 64.
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4
Craft a dried kelp block
Combine nine dried kelp in the 3x3 grid to make a dried kelp block — a furnace fuel that smelts 20 items, beating coal per-item for bulk smelting.
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5
Automate with an observer
Plant one kelp facing an observer with a piston above it; each growth tick triggers the piston to shear the top segment into a water-stream collector for a hands-free farm.
Kelp stops growing once it reaches its random maximum height (2–26 blocks), so observer farms only fire while the plant is still extending. Bone meal forces one extra growth instantly.
Used in crafts
Related blocks
Frequently asked questions
Can you craft kelp in Minecraft?
No. Kelp cannot be crafted — it only generates naturally on the ocean floor and is collected by breaking the plant. Only the dried kelp block is craftable, from nine dried kelp.
How tall does kelp grow?
Kelp grows to a random maximum height between 2 and 26 blocks per column, adding one segment at a time through the water above it.
Is kelp a good fuel in Minecraft?
Dried kelp blocks are an excellent fuel — one block smelts 20 items. Raw kelp is not fuel by itself, but because kelp is renewable, dried kelp blocks form an unlimited fuel source.
Does kelp work in both Java and Bedrock Edition?
Yes. Kelp behaves the same in Java and Bedrock Edition: it generates in ocean biomes, smelts into dried kelp, and composts at a 30% rate.
How does kelp stop water from flowing?
Planting kelp converts flowing water into source blocks. Breaking the kelp afterwards leaves the source water behind — a quick trick to fill or waterlog an area.
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