From the official Bonemeal wiki:
The kelp plant grows a random amount of blocks tall, unless the top reaches age 24. |
But Kelp is growing 1 block every time bonemeal is used on it. Couln't find any indication of when(if) this was changed during any 1.16 snapshot as well
Linked issues
Comments 3
Tests results:
20w11a and 20w12a: kelp would grow a random number of blocks when bonemealed
20w13a forward: kelp grows 1 block when bonemealed
Thanks for the answer. I'll proceed to edit the wiki if this is working as intended
This is working as intended, see MC-176989.
The wiki is not an official information source, please check if the behaviour of this was different in older versions. If it wasn't, the wiki is wrong.