There is no tier list of soil in Mycelarium. The underground is described as four materials — food pockets, water reservoirs, hard soil and impassable stone — and in the demo the soil itself is mostly one brown layer with a thin darker band under the grass, while the distinct materials you meet along the way are the impassable stone outcrops and the pale salt rocks scattered through the ground.
Mycelarium soil types: the four materials underground
| Material | What it does |
|---|---|
| Food pockets | Buried food, one of the two things the first expedition looks for |
| Water reservoirs | Blue pools, and the water your shots are paid from |
| Hard soil | A denser layer that hyphae need help getting through |
| Impassable stone | Outcrops that a hypha cannot cross at all |
On top of that list, the pale salt rocks are the thing you actually harvest — they give food, they are finite, and running out of them is what leaves a colony starved.
Breaking through hard layers
Soil penetration is one of the six upgradeable attributes, and in the tree it sits below Water Efficiency, which is what makes it the node that opens up harder ground. A hyphae shot that would stop in a dense layer pushes through once the upgrade is bought.
The full game is planned to add different levels of soil, and a player has asked whether there is more than two qualities of earth. Until those layers arrive, the demo gives you one workable layer, one darker band under the grass, and stone you cannot pass. Where the penetration node sits is in the upgrade tree guide.
When hyphae cannot cross stone
Stone is not a wall you break with a bigger upgrade — hyphae simply cannot cross it. The answer is to go around or over it: launch a wind-carried spore into the empty space on the far side and let it seed a new growth point, then grow from there. That is in wind carried spores.