Your best plant will lose the vote, and it’s supposed to
You did the breeding. You planted your nicest hemp, you surrounded it with your second-nicest hemp, and what came out was worse than either parent.
That is not bad luck. Crossbreeding in Rust is a weighted election, and the weights are rigged against the genes you want.
| Gene | Name | What it does | Crossbreed weight |
|---|---|---|---|
| G | Growth | Shortens every growth stage | 0.6 |
| Y | Yield | More cloth per harvest, more clones | 0.6 |
| H | Hardiness | Copes with cold, heat and bad conditions | 0.6 |
| W | Water | Drinks more water, no upside | 1.0 |
| X | Empty | Does nothing, just occupies a slot | 1.0 |
Read that table again. Every gene you want is worth 0.6. Every gene you don’t want is worth 1.0.
So one lone W neighbour beats one lone G neighbour, every single time. And it takes two identical green neighbours stacking to 1.2 to outvote a single red one. A G and a Y side by side don’t stack at all — they sit at 0.6 each and lose to the W.
There is one more rule that makes this survivable: the neighbours only overwrite if they strictly beat the plant’s own gene. A tie keeps the centre’s gene. That is the thin margin the whole breeding process runs on.
What you are breeding toward
Every plant has exactly six gene slots. Position does not matter — GGGYYY, GYGYGY and YYYGGG are the same plant.
| Genome | What it is for | Clones |
|---|---|---|
| GGGYYY | God clone — optimal speed and yield | 3 |
| GGYYYY | One less Growth, one more Yield | 4 |
| GGGGYY | Fastest possible, lower yield | — |
| GGGYYH | Snow-biome variant, where H earns its slot | — |
Two decisions to make before you start:
GGGYYY or GGYYYY? GGGYYY is the target most farmers chase — three Growth, three Yield. GGYYYY gives up a little growth speed for an extra yield gene and one extra clone per clone action, which compounds fast when you are re-cloning every cycle.
Is H worth it? In a heated, lit, watered room, H does nothing a heater cannot do, so treat it as a wasted slot. If you farm in a snow biome without electric heaters, GGGYYH is the right target.
What the genes are worth in time
This is the part that justifies the whole grind.
| Plant | Plain seed to Ripe | GGGYYY to Ripe |
|---|---|---|
| Hemp | ~5 h | ~1 h 35 m |
| Berries | ~5 h | ~1 h 35 m |
| Pumpkin / Corn | ~5-7 h | ~2 h |
Three times the throughput out of the same planter, the same water and the same light. A god clone is not a marginal upgrade; it is most of a farm’s output.
The crossbreeding vote, step by step
When a plant reaches the Crossbreed stage, each of its six slots is decided independently:
- Every adjacent plant of the same crop votes in that slot, adding its gene’s weight. Only identical genes stack — two Y neighbours make Y = 1.2, but a G and a Y stay 0.6 each.
- The highest total wins. Ties between neighbours are a 50/50 coin flip.
- The winner only replaces the centre’s gene if it strictly beats it. A green gene at 0.6 falls to one red neighbour (1.0) or two matching green neighbours (1.2). A red gene at 1.0 needs two matching greens to shift it.
Adjacency is why the layout matters. In a Large Planter Box’s 3×3 grid:
| Position | Neighbours touching it |
|---|---|
| Centre | 8 |
| Edge | 5 |
| Corner | 3 |
The centre slot is the breeding slot. Build your new strain there and nowhere else.
Two things that will waste your time: hemp next to berries does nothing to either — only the same crop crossbreeds. And the centre slot touching all eight is a double-edged sword: it receives the most votes, which means it also receives the most bad votes if you surround it with junk.
The layout that works
Here are the two published methods. Both work; they trade thoroughness against speed.
The eight-neighbour method (from whenisforcewiperust):
- Plant the plant you want to change in the centre first.
- About 15 minutes later, fill all eight surrounding slots with donor clones carrying the genes you want.
- Make sure at least two neighbours share the good gene in every slot — otherwise that slot’s vote comes in at 0.6 and loses to whatever red gene is already there.
- The centre hits Crossbreed while the neighbours are still young, so it takes their genes before the neighbours start changing each other.
- Read the centre’s genes at Mature and clone if it came out right.
Worked example: plant an XGYYHG in the centre and surround it with GGGYYY clones. Every slot sees at least 1.2 of a good gene from the neighbours. The X and the H get overwritten and the centre comes out GGGYYY.
The four-neighbour cross method (from gamesstarter):
- Put your target in the centre.
- Put donor clones in the four cross positions — top, bottom, left, right.
- Plant the centre seed first and let it get about halfway through its Sapling stage before you plant the donors.
- When the centre hits Crossbreed, clone.
The head start in step 3 is the part people skip, and it is load-bearing. If you plant all nine at once, the donors crossbreed with each other first and arrive at the centre’s Crossbreed moment carrying each other’s junk instead of your intended genes.
If you would rather not do six-slot arithmetic in your head, community calculators such as RustBreeder take your clone strings and map out the multi-generation path, including which clone goes in which slot.
The clone window — the step you cannot redo
Plant stages run: Seedling → Sapling → Sprawling → Crossbreed → Ripe → Dying.
The crossbred genome is locked in when the Crossbreed stage starts and it dies with the plant. Miss it and those genetics are gone permanently; you have to run the whole layout again.
There is a genuine disagreement between guides on exactly when the clone menu appears:
- frozen-rust and gamesstarter say clone at the Crossbreed stage, before Ripe. The crosshair icon is the indicator.
- whenisforcewiperust says clone at Mature.
- supercraft.host says the clone option is only available at Ripe.
These cannot all be strictly true. The safe play costs nothing: keep a hatchet in hotbar slot 1 on every breeding round and try to clone from the Crossbreed stage onward. If the menu does not open yet, you have lost nothing by checking.
Also worth knowing: donor count decides whether the result is reliable. Six or more neighbours carrying the same gene in a slot is safe; three to five is a coin-flip you will lose some of the time.
The seed-to-god-clone loop
Phase 1 — collect and cull. Pick wild hemp and berry bushes along rivers and in grassy areas. Plant them somewhere disposable and read each one’s genes at the Sapling stage.
Keep anything with plenty of G and Y, especially in slots 1, 4 and 6 — those are the ones people end up stuck on. Throw away anything carrying more than two red genes. Do not get sentimental; a plant with three W genes is a liability you will spend an hour breeding out of.
One tip for this phase: the in-game description on Chicken Pie says it increases the chance of better genes from crops for a short time. Eat one before a big seed-planting session.
Phase 2 — breed. Use the layout above. Let a calculator do the multi-generation planning if you have one.
Phase 3 — clone and lock it in. Clones are genetic photocopies with no RNG. Once you hold a god clone, fill the planter with clones of that one plant and stop crossbreeding entirely — from then on you just re-clone the best plant every cycle.
Wild plants cannot be cloned. You have to plant the seed, grow it, and clone the grown plant.
Things that will cost you your god clone
Seeds and clones stack to 50 and despawn five minutes after you drop them. Do not leave a god clone on the floor while you go do something else.
Seeds reroll every time. A seed rolls brand-new random genes when it goes in the ground, so planting saved seeds from your best plant gives you nothing. Clones are the only way to keep genes.
Genes never move between slots. A G in slot 2 stays in slot 2 in every clone of that plant. Crossbreeding is the only thing that changes a gene.
Conditions wreck the math. Any dip in water, light or temperature slows growth and throws off your timing. Keep each Large Planter Box between 6,000 and 9,000 ml, hang one ceiling light over the centre of each box, and add an electric heater per farm room in cold biomes. Push past 10,000 ml and the plant flips to Overwatered and growth stalls.
W genes drink more. A clone with a W gene will drain the planter faster than its neighbours, which is one more reason to breed them out rather than tolerate them.
Never mix berry colours in one cross. The species tag overwrites, and you end up with a plant that is not the crop you were breeding.
Good clones are currency. Perfect clones sell for real scrap in vending machines, and buying a decent starter clone at Bandit Camp or from a neighbour can skip hours of breeding.
Getting the most out of the cloth
Hemp’s output is plant fibre, which becomes cloth. God-clone hemp at 1h35m per cycle feeds sewing kits, burlap, bags and the rope you need for a lot of the tech tree, and it stacks with the same genes on berries if you want to run teas too.
The eight teas, if you are farming berries alongside:
| Tea | Recipe | Pure effect | Duration |
|---|---|---|---|
| Healing | 4× red | +60 HP instant | instant |
| Max Health | 3× red, 1× yellow | +20% max HP (120 HP) | 5 min |
| Ore | 2× yellow, 2× blue | +50% ore yield | 30 min |
| Wood | 2× red, 2× blue | +200% wood yield | 30 min |
| Scrap | 2× yellow, 2× white | +200% barrel scrap | 30 min |
| Anti-Rad | 2× red, 2× green | +45% rad resistance | 30 min |
| Warming | 2× red, 2× yellow | +15°C, min temp 0°C | 60 min |
| Cooling | 2× green, 2× white | Cooling effect | 60 min |
Brew at a Mixing Table or Cooking Workbench. The order of the berries matters — check the recipe before you dump them in.
The whole thing in five lines
Plant a batch of wild seeds. Cull everything with more than two red genes. Put your best survivor in the centre of a 3×3, plant it first, then ring it with donors sharing at least two of the same good gene per slot. Clone at Crossbreed with a hatchet on your bar. Then never crossbreed again — just re-clone the winner, forever.
The vote is rigged. Two greens beat one red. That one rule is the entire secret.