On bedrock edition kelp can only ever grow 15 blocks tall (and it will always grow that tall if it can MCPE-42575) Where as on java edition, kelp can grow up to 25 blocks tall naturally.
MCPE-42576
Kelp Can Only Grow 15 Tall, Instead Of 25
Resolved
Fixed
18
(Unassigned)
181069
Confirmed
Windows
window 10
1.16.0.59 Beta, 1.13.1, 1.9.0, 1.14.60 Hotfix
1.14.0, 1.16.0
Retrieved
I red in some forums this is intended for the bedrock version of Minecraft because of "performance issues = low frame rates". This countermeasure seems to be Ok for me - so we all can have only 15 blocks high kelp-farms. Fine for me. 🙂Â