Alchemy Factory Fertilizer Calculator: Rates & Ratios

Quick answer

You can already do the fertilizer math by hand. A nursery uses fertilizer every 12 seconds (about 5 per minute), and an observed automated module produces about 20 per minute. That means one module feeds roughly three nurseries after supplying itself — the core ratio any fertilizer calculator would compute.

The inputs a calculator needs

Two numbers drive the whole calculation. The use rate is fixed: nurseries consume fertilizer once every 12 seconds, which is 5 per minute. The output rate depends on your module — community builds show about 20 fertilizer per minute from a three-crucible plant-ash line.

A calculator would simply divide output by use rate and subtract one for the module feeding itself.

The confirmed ratio

20 per minute divided by 5 per minute equals four consumers, minus the module itself leaves three nurseries supported per module. This 1:3 planning rule comes from community let's-play footage and matches the documented fertilizer chain (plant ash from sage, quicklime from stone).

Why the ratio matters early

Fertilizer is the gate on your farming side. If you under-build modules, nurseries stall; if you over-build, you waste crucible capacity. The 1:3 ratio lets you scale farming in predictable steps instead of guessing.

The fuel-efficiency caveat

A fertilizer module that self-fuels from wood into charcoal powder will stutter unless you have at least one fuel-efficiency upgrade, preferably two. Any calculator should flag this: the module's effective output assumes the fuel loop is stable.

What is still unconfirmed

A specific Alchemy Factory fertilizer calculator tool, its exact formula across upgrade tiers, advanced-fertilizer bonuses, and crop-specific nursery rates are 待确认. The 12-second use rate and 20-per-minute module figure should be re-checked against your own build before relying on them at scale.