What you see
In the greenhouse, one player is in Rockbury (the past) and the other in the Present. A seed planted in a Rockbury pot grows in the same pot in the Present. Each seed needs the right pair of fertilisers, and some need water or light.
How it works
- Take a seed from a dispenser in Rockbury.
- Mix two fertilisers into it at the station: the left and right handles pick one fertiliser each.
- Plant it in a Rockbury pot. The plant grows in the matching Present pot if the pot meets its needs.
The Ultimate seed is not in a dispenser: it sits in a container in the Present.
| Handle | Fertiliser | Shape |
|---|---|---|
| 0 |  Blue | Triangle |
| 1 |  Red | Rectangle |
| 2 |  Purple | Circle |
| 3 |  Green | Gourd |
| 4 |  Orange | Trapezium |
Handle values are the game files' 0 to 4. We have not confirmed how the five positions are marked on the station, so match the colour and shape.
What a plant needs
- Fertilisers: both must be the seed's two. Either order works.
- Water: some seeds need water, some must not have it, and some do not care. Only pot C has water.
- Light: a seed that needs light needs exactly one light on its pot. Two lights is as wrong as none.
| Pot | Water | Lit by plates |
|---|---|---|
| A | no | A |
| B | no | C |
| C | yes | B + C |
| D | no | none |
| E | no | D |
Lights are pressure plates in Rockbury. Each plate lights one or two pots:
| Plate | Lights pots |
|---|---|
| A | A |
| B | C |
| C | B + C |
| D | E |
A fifth plate, E, points at a pot F that does not exist in the data.
Solution
Which seed to plant where along the way, and in what order, is not in our data. This page gives the recipes and the rules only.
Show hint
Read the whiteboards. The electric plants (Electric area and Electric hook) react to the purple fertiliser and cannot grow in water. The Ultimate plant reacts to water.
Show the answerSpoiler
Each seed's recipe. “Pots” lists every pot where the seed can grow when the right plates are pressed.
| Seed | Fertiliser | Water | Light | Pots |
|---|---|---|---|---|
 Bush | Green 3Red 1 | any | exactly 1 | A B C E |
 Electric area | Orange 4Purple 2 | none allowed | any | A B D E |
 Electric hook | Blue 0Purple 2 | none allowed | exactly 1 | A B E |
 Ladder | Green 3Orange 4 | any | exactly 1 | A B C E |
 Ladder (decoy) | Blue 0Green 3 | any | any | A B C D E |
 Light | Purple 2Red 1 | any | any | A B C D E |
 Step | Orange 4Red 1 | any | any | A B C D E |
 Ultimate | Blue 0Red 1 | needed | any | C |
The Ultimate seed takes the blue and red fertilisers and needs water, so it only grows in pot C.
Who is where
| Hook Gun player | Goop Gun player | |
|---|---|---|
| Start | Present | Rockbury |
| Midway | Rockbury | Present |
| Done | Present | Rockbury |
The two players swap eras midway through the puzzle.
Say the fertilisers by colour and shape (“blue triangle, red rectangle”), and say which plates are pressed before planting.
Clue documents
Tooltips in the Present name two of the recipes by their chemicals:
- “Vanadium (purple) & Chromium (Blue)” (Electric hook)
- “Vanadium (purple) & Cobalt Amine (orange)” (Electric area)
Common mistakes
- Pressing both plates B and C for pot C. Seeds that need light need exactly one light.
- Planting an electric seed in pot C. Pot C has water, and these seeds cannot have water.
- Putting the Ultimate seed anywhere but pot C. It needs water.
- Worrying about which handle takes which fertiliser. Either order works.
- Some players on the Steam forum report getting stuck in the greenhouse side room. A full restart of the game fixed it for them.
Achievement
All Grown Up
Cultivated a Battery Bulb
How it unlocks (spoiler)
Complete the greenhouse plant puzzle.
Read from the game files of version 1.0 (no guesswork). Something wrong in your game? Tell us and we will check it. Report a problem