On Minecraft I went to the nether and brought home a crimson mushroom and planted it. I then gave it some bonemeal to see if it would actually grow into a crimson tree. I wasted 21 bonemeal on it and it still hasn’t grown. 

How to reproduce:

1. /gamemode 0
2. /give @s crimson_fungus (This might not be the correct ID for a crimson mushroom. So if you know it put that in instead.)
3. /give @s bonemeal 21
4. Use all 21 bonemeal on the crimson mushroom. 

Expected results: The mushroom should grow into a crimson tree or something with 10 bonemeal at the most. 

Observed results: The crimson mushroom does not grow.