Rust / Guide

Cloning and crossbreeding in Rust: how to breed a godclone

Read genes, save clones, crossbreed in a large planter: the rules behind every cross and a routine that turns random seeds into GGGYYY.

Updated 13 October 2026 · 8 min read

In short

To keep a good plant, take clones. Seeds receive random genes when planted; a clone keeps its parent plant’s genes.
A plant’s six letters describe its traits. G speeds up growth, Y increases yield and H helps in difficult conditions. W increases water use; X takes up a slot without adding a benefit.
During crossbreeding, nearby plants influence the centre plant’s genes. This happens once, when it reaches Crossbreed. Only eligible neighbours of the same plant type in the same planter count.
Two matching green genes in a slot can beat a red gene. Whether your preferred gene wins also depends on the other neighbours. The worked example below shows how to check this.
GGGYYY is a common target for regular harvesting. ClonePilot can show you how to arrange your existing clones to reach it. Plant the centre first so it reaches Crossbreed before the donors.

Reading the six genes

Look at a planted plant or hover over a clone or seed in your inventory: under “Genetics” you see six coloured letters. Green is good, red is bad. The order does not change the effect – it only matters when crossbreeding, because that compares slot by slot.

Rust inventory: Sunflower Clone with the genetics X Y Y X W W — A sunflower clone with XYYXWW: two good yield genes, four bad ones. You would not keep a clone like this – or only as a donor for single slots.

Gene	Meaning	Effect
G	Growth	The plant grows faster.
Y	Yield	More harvest and more clones per plant.
H	Hardiness	Copes with worse conditions, mainly temperature. Rarely needed in a heated indoor farm.
W	Water	The plant needs more water.
X	Empty	No use. It just takes a slot.

Seeds get random genes, clones keep them

Seeds and clones do different jobs. Seeds give you new combinations to work with: even a seed from your best plant’s fruit receives random genes when planted. Clones preserve a combination you want to keep. Start with seeds, clone useful plants, then use those clones for planned crosses.

Plants	How you get seeds	More seeds
Berries, pumpkin, corn, potatoes	Pick the wild plant: 1 seed and 1 crop. Every crop you eat gives 1 seed – whether from the wild or from your planter.	Any time: harvesting a planter gives no seeds, but every crop you eat does. A wild plant thus yields 2 seeds.
Hemp, sunflower, rose, orchid	Pick the wild plant: exactly 1 seed. These plants cannot be eaten.	Only in the wild – harvesting a planter gives no seeds.

Every seed becomes a plant with random genes when planted – even one from a crop of your godclone. You only pass good genes on through clones.

Cook a regular Chicken Pie at the Cooking Workbench using 3 each of wheat, eggs, corn and cooked chicken. Add 4 cream for Rich Chicken Pie, which improves the chance further. Cream comes from cow’s milk refrigerated for four hours and then skimmed.

Have your seeds ready before eating the pie so you can spend its duration planting. A batch of 48 is a practical start, matching a full box that ClonePilot can scan at once. Random genes determine whether that batch is enough for your target; add more later if needed.

Rust inventory: Chicken Pie with Gene Chance “Increase”, duration 10m and the tooltip “Extra chance for a plant gene to become positive.” — In the game: **Gene Chance – Increase**, duration **10m**. The tooltip explains the effect: an extra chance for a plant gene to become positive.

Hold E on a planted plant and choose Take Clone in the radial menu. This works from the Sapling growth stage on, but not during Crossbreed.
To save the genes before crossbreeding, clone at Sapling. To keep the result of a cross, clone from Mature on.
More Y means more clones per plant: with four Y you get 4 clones, with three or two Y 3 clones. You always get at least 2 clones, even without any Y.
Label your boxes or enter the clones in ClonePilot – after three generations nobody remembers which clone was which.

Rust: a plant's radial menu with the “Take Clone” option — The plant's radial menu: **Take Clone** takes the clones.

How a cross is decided

The crucial growth stage is Crossbreed. Only then does a plant take genes from its neighbours. Seed, Seedling and Sapling come before it; Mature, Fruiting and Ripe follow. Once crossbreeding is complete, the genes are fixed.

Plant the centre before its donors. It needs to reach Crossbreed first, while the neighbours still have their original genes. The middle of a large planter works well because all eight surrounding slots are adjacent, including the diagonals.

Eligible neighbours: Only directly adjacent plants of the same type in the same planter count. Red and blue berries are different types.
Planter position: The centre has eight neighbours, an edge slot five and a corner three. The centre gives you the most donor options.
Calculate one gene slot at a time: A neighbour’s green gene counts as 0.6; a red gene counts as 1.0. Add matching letters in the same slot together.
Compare with the centre: The gene with the highest total can replace the existing gene, but that total must exceed the weight of the gene already in the centre.
Check for ties: If two genes share the highest total, the choice between them is random. Two equally strong candidates give a 50–50 result.

Example: four average clones become GGGYYY

None of the four donors is perfect, each has one weak gene. Because the weaknesses sit on different slots, the right gene appears three times on every slot (3 × 0.6 = 1.8) – more than any single red gene (1.0). The centre is guaranteed to become GGGYYY, whatever seed or clone is planted there.

empty
GGXYYH
empty
XGGYHY
Centreany
GHGYYY
empty
GGGXYY
empty

Result in the centre

Donor
Top donor	G	G	X	Y	Y	H
Left donor	X	G	G	Y	H	Y
Right donor	G	H	G	Y	Y	Y
Bottom donor	G	G	G	X	Y	Y
Result	G	G	G	Y	Y	Y

Slot 1: G 3 × 0.6 = 1.8 · X 1 × 1.0 = 1.0 → G

Donors top, left, right and bottom, the corners stay empty. The table stacks the four donors – each column is one gene slot. Tap a slot to see which genes compete there and why the result wins.

Step by step to a godclone

Collect and plant seeds. Eat a Chicken Pie first and plant within the next 10 minutes. Start with 48 seeds – one full box for ClonePilot. Add more seeds if the genes are not enough for your target.
Clone good plants. Keep anything with at most one red gene and plants whose green genes sit on different slots. Clone them at the Sapling stage.
Enter the clones in ClonePilot. “Scan Rust” reads the genes straight from your screen, or you type them in by hand.
Pick a target and calculate. ClonePilot shows which clones to plant around the centre and how certain the result is (100% or 50%).
Plant the centre first. Put it alone in the large planter and wait until it reaches Sapling with at least 30% progress in that stage. Allow roughly 10–15 minutes as a guide, but follow the plant’s display rather than a stopwatch. Then add the donors.
Check the result and clone it. Once the centre is Mature, look at its genes. If the result is right, take clones and store them – that is your new stock.
Repeat. If your donors are not good enough, ClonePilot first suggests an intermediate clone (Gen 2). Use it to keep crossing in the next round.

Open ClonePilotScan or enter your clones, pick a target, get the finished planter layout.

Rust: large planter from above with one plant in the centre and one each at the top, left, right and bottom — The example layout in the game: the large planter has three rows of three slots. The centre and the four sides are planted, the corners stay empty.

Which target suits you?

Target	Best for	Clones per plant
GGGYYY	The godclone and the most effective choice for every plant if you harvest right at Ripe. The optimum for berries: three Y already give 5 berries, a fourth Y adds none.	3
GGYYYY	More yield, but slower growth. Pays off for pumpkin, corn, potatoes, hemp and flowers if you do not harvest right at Ripe – for example because you are out. No advantage for berries. Gives one more clone.	4
GGGGYY	Ready fastest, less yield. For short sessions and frequent harvests.	3
with H	Only useful outdoors in cold or heat. In a sheltered, heated farm H wastes a slot.	–

Light, water, ground, temperature

Good genes only help if the plant is looked after. Rust rates light, water, ground and temperature separately – the worst value holds back the whole plant. A single weak spot costs more than an extra G gains.

Rust: panel of a freshly planted Red Berry with genetics W H W W Y H and the conditions light 100%, water 0%, ground 75%, temperature 100%, overall 0% — Look at a plant to see its genes and conditions. This red berry has light and temperature at 100%, but no water – so **Overall** is 0%.

Light: sunlight or ceiling lights. Without light, nothing grows.
Water: sprinklers with fresh water. Run salt water through a water purifier first. Radioactive water kills plants.
Ground: fertilizer from the composter sets ground to 100%.
Temperature: in cold biomes and at night, heaters near the planters help.

Common questions

Does a GGGYYY plant give me GGGYYY seeds?

No. Eating a crop of your GGGYYY clone does give you a seed – but it gets random genes when planted. You only pass good genes on through clones.

Does the Chicken Pie really give better genes?

Yes, for 10 minutes every plant gene gets an extra chance to become positive – but nothing is guaranteed. According to the game, the Rich Chicken Pie (with 4 cream) works considerably better. For a godclone you still cannot skip targeted crossbreeding.

Do plants in two different planters crossbreed?

No. Only neighbours in the same planter count – even if two planters stand right next to each other.

Why did my cross not give the expected result?

Usually a neighbour was planted too early or too late, a different kind stood next to it, or a slot had a tie. Check the layout with ClonePilot – it marks 50% results explicitly.

Do I need W genes for more water?

No. W means the plant needs more water. It is a bad gene.

Do the times apply on every server?

No. Servers can change growth times. The 8–10 minutes until Sapling apply to default settings. So go by the stage the plant shows: only plant the donors once the centre is at Sapling 30% or more.