I've planted a Glowing Mushroom farm before and got it to grow small Glowing Mushrooms. On the previous world I had created I actually got the tall Glowing Mushrooms to grown in the farm — they looked very cool. I started a new world the other day on the 1.1 patch and I've noticed that — even though I did the same things — there were no large mushrooms. I suspect the depth is wrong, even though glowing mushrooms are growing.
Here are the things that I think you need to do:
- mud
- heat source (this seemed to help the tall Glowing Mushrooms on the last world, they were more likely to grow near a torch)
- depth (think anything under level is fine, but does the depth matter for tall Glowing Mushrooms?)
- time (wait, wait, wait)
- height (I think at least 20 blocks of space)
Best Answer
I set up two mushroom gardens to test this:
One: -200 feet, torches every few steps under the one block of mud, about 4 mushroom grass planted at the same time.
Two: -800 feet two mushroom grass planted at the same time, one with a torch underneath, one with no torch.
Result: In garden one the tall mushrooms grew all over the place at about the same time. In garden two the tall mushroom grew under the torchless portion first.
Conclusion: torches don't really matter, just be at negative depth, give about 20-25 blocks of space above. Above all, wait. The tall mushrooms take a while to show up.