Alchemy Factory Fertilizer: Automate Early Game

Quick answer

In Alchemy Factory, fertilizer is consumed by nurseries to grow crops, and a nursery uses fertilizer every 12 seconds (about 5 per minute). The most reliable early-game approach is to automate a fertilizer module fed by plant ash from sage and quicklime from stone, then let one module supply several nurseries.

Why fertilizer is an early priority

Fertilizer decides whether your nurseries actually produce. A nursery with no fertilizer simply stalls, and manual fertilizing eats the time you need for everything else. Automating it early removes a recurring manual task and frees your day for planning and expansion.

Community playthroughs show fertilizer as "the most important early-game design" because it underpins the entire farming side of the factory. Once a fertilizer loop is stable, you can upgrade it into advanced fertilizer later for much higher value.

The fertilizer production chain

A working fertilizer module combines two sourced inputs. Plant ash comes only from sage, burned in a crucible. Quicklime powder comes from quicklime, which itself comes from stone; the quicklime step runs in a grinder (about a 9-second craft) and the quicklime-powder step in a crucible (also about 9 seconds), giving a consistent build speed across the chain.

Those two inputs meet at the fertilizer step. Because both source chains are steady, the module's output rate is predictable, which matters when you size how many nurseries it can feed.

The numbers that matter

Observed community builds produce about 20 fertilizer per minute from a single module (three crucibles running plant ash at roughly 6.7 per minute each). A nursery consumes about 5 per minute, since fertilizer is used every 12 seconds.

That math is the key planning rule: one 20-per-minute module supports four consumers, but one of those is the module feeding itself, so it realistically supports three nurseries. When you scale farming, you scale fertilizer modules in roughly a 1:3 ratio with nurseries.

The fuel-efficiency requirement

There is one trap. A fertilizer module that burns wood into charcoal powder to self-fuel will stutter and spill its output unless you have at least one fuel-efficiency upgrade — preferably two. Without it, the wood-to-charcoal loop does not make enough fuel to feed itself, and the build jams.

The same playthroughs recommend keeping fertilizer production independent of fuel production: feed leftover planks from advanced fertilizer into relics or trash rather than into coke powder, so a fuel shortage never breaks your farming line.

How fertilizer connects upward

Fertilizer is also the gateway to higher-value potions. The documented path onward runs through glass (sand fired in a kiln, about 6 seconds each), then a blender, then a vitality potion. That is a longer, more complex build, but it starts from the same stable fertilizer base.

What is still unconfirmed

Exact fertilizer yield per machine at every upgrade tier, the precise advanced-fertilizer bonus values, and any nursery crop-specific rates are 待确认. The 12-second use rate and the 20-per-minute module figure come from community let's-play footage and should be re-checked against your own build. Treat them as a planning baseline, not a guarantee.