Graveyard Keeper 2 Farming — Fertilizers, Seeds & Crop Quality

The launch build (Sep 22, 2026) changed how farming works versus the pre-launch guides: crop growth is now a 12-step system where fertilizers are applied before planting and never expire until replaced. The single most-searched question — "rich growth fertilizer" — is actually the Rich Growth Elixir, the ingredient in Farming Fertilizer II. Here is the full launch-verified system.

Which Fertilizer Should You Use?

Farming Fertilizer II (4 Peat + Rich Growth Elixir)
  → the seed-quality workhorse, +3 bed skill
Farming Fertilizer I (2 Peat + Weak Growth Elixir)
  → budget option, +2
Farming Fertilizer III (8 Peat + Miracle Growth Elixir)
  → endgame, +5
Peat
  → cheap filler, +1
Headstart I / II
  → guarantees 1–2 completed growth steps at planting
Crop Boosting
  → adds 2 growth steps (tooltip says +1)

Best combos: Farming + Peat (volume), Farming + Headstart (star upgrades), Crop Boosting + Headstart (high-skill beds).

The 12-Step Growth System

• Every crop runs 4 planting steps + 8 automatic growth ticks = 12 steps total.
• Reaching the next star grade needs about 11 successful steps — one bad step can stall a star upgrade.
• Cells 1–10 pay the seed’s own grade; cells 11+ pay one grade higher — which is exactly why Headstart and Crop Boosting (extra guaranteed steps) push crop quality upward.
• Your Keeper’s Farming skill only matters at planting time, not during growth.

How Seed Upgrades Actually Work

1. Apply fertilizer before planting — it stays on the bed until you replace it
2. Plant the crop and let the 12 steps complete
3. Harvest: the upgraded cells pay out seeds one grade higher
4. Replant the upgraded seeds and repeat — bronze → silver → gold, one tier at a time

Fertilizer Types Compared

The "Rich Growth Fertilizer" Question

Searchers call it "rich growth fertilizer" — the game calls it Rich Growth Elixir, and it is an ingredient, not a fertilizer you spread. It unlocks with Fertilizers III research (60 green + 15 blue), which also unlocks Farming Fertilizer II and Headstart II. Craft 4 Peat + 1 Rich Growth Elixir into Farming Fertilizer II — that is the fertilizer everyone is actually looking for. The next tech tier, Fertilizers IV (150 green + 30 blue), unlocks Farming Fertilizer III and Miracle Growth Elixir.

Application Rules & Common Mistakes

• Apply fertilizer before planting — it persists on the bed until replaced
• Beds cap at 2 fertilizer slots (Fertilizers I tech = 1 slot, II = 2). Slots beyond that look unlockable in the current build — they are a known issue, not a research target
• 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
• Peat loops: every crop drops 2 Leaves, the Compost Pile turns 8 into 2 Peat (upgraded pile: 16 → 5), and the Compost Chemist perk doubles output

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