Graveyard Keeper 2 Farming & Fertilizer

The single most-asked farming question is also the most misunderstood: seeds do not multiply from Peat or Boost — they upgrade from Quality Fertilizer, one tier at a time. Here is the full system.

Which Fertilizer Should You Use?

Short answer

Quality Fertilizer II (gold)
  → upgrades your seeds one tier per harvest (bronze → silver → gold)
Quality Fertilizer I (silver)
  → budget option, cheaper, same idea
Peat
  → +1 seed per crop, no quality upgrade
Boost
  → growth speed only, does NOT change seeds

Apply order: Peat first → Quality second. Reversing it erases the effect.

How Seed Upgrades Actually Work

Plant upgraded produce alongside Quality Fertilizer II
Harvest: you receive upgraded seeds for the next tier instead of plain seeds
Replant the upgraded seeds with Quality II and repeat
One tier at a time — bronze + Quality II yields silver, never gold in a single jump

Fertilizer Types Compared

Fertilizer	What it does	Use when
Quality Fertilizer II (gold)	Upgrades seed tier; ~2 upgraded seeds per crop	Always, on the crop line you are pushing to gold
Quality Fertilizer I (silver)	Upgrade path on a budget, ~1 seed per crop	Early fields where gold quality is too expensive
Peat	+1 seed per crop, no quality change	Volume farming, filling the pantry
Boost	Faster growth only	Tight timers — never for seed farming

Application Order & Common Mistakes

Peat goes on first, then Quality — applying them in the opposite order removes the quality effect
Do not expect Boost to fix a seed shortage; it only compresses the clock
Zombie-run farms do not upgrade seeds for you — automation is for volume, not for breeding stock
Keep one manual field purely for seed production; automate a separate field for bulk crops

This is the GK1-verified system and matches pre-launch community testing for GK2. If the launch build adjusts yields, the numbers here get re-stamped on Sep 22 — the mechanics above are what the 4K/month search question is actually asking.

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