Parasitizing trees in Mycelarium runs through two separate upgrade paths, and you need both to get the full value out of a tree: the ENZYMES path through Absorption and Parasitism, which is what takes nutrients from the tree, and the FRUITING BODIES path through the Tree Mushroom, which is what makes a tree yield water and drop material. Trees can become future sources of nutrients once these are in place.
Mycelarium how to parasitize trees: two upgrade paths
The enzyme path — ENZYMES:
- Absorption → Absorption Speed and Absorption Yield.
- Absorption Yield → Parasitism → Parasitism Speed and Parasitism Yield.
The mushroom path — FRUITING BODIES:
- Predator Mushroom → Tree Mushroom → Tree Water Yield and Tree Drop Rate.
Symbiosis is the third relationship with the forest, sitting alongside Absorption at the top of the enzyme branch.
Where these nodes sit relative to each other is in the upgrade tree guide.
Which mushroom works on trees
The Tree Mushroom is the one, and it is a child of the Predator Mushroom, so the food line comes first. It splits into two upgrades with clearly different jobs:
- Tree Water Yield — the tree gives up water, which is what pays for your shots.
- Tree Drop Rate — the tree drops material more often, which is the food side.
What the Tree Mushroom does compared with the other mutations is in the mushroom mutation list.
What you can take from a tree
The game says trees can become future sources of nutrients and lists "Parasitize trees" as a feature, but the exact yield is still something players are asking about — including whether dead trees can be fed on. Until that is spelled out, plan around the two named outputs, water and tree drops, rather than assuming a tree is a third food source.