Planter Box Guide
Quick answer: the machine players search as "planter" is officially the Planter Box — "used to turn Wet Seeds into Flowers." Every Flower it grows carries 1 Gold and 4 Amethelis in its head, making it the farming end of the gold loop.
What It Is and What It Costs
The Planter Box unlocks in Research Tier 3 for 2,000 Gold, described as growing "various crops" — Wet Seeds grow into Flowers that yield Gold and Amethelis when harvested.
Its core behavior is one sentence on the official wiki: "When a Wet Seed touches a Planter Box it will grow into a Flower." Unusually for a machine, it does not block liquids or gases — only the player.
| Field | Value |
|---|---|
| Research cost | 2,000 Gold (Tier 3) |
| Input | Wet Seed (Seed + Water) |
| Output | Flower — head of 4 Amethelis + 1 Gold on a Vine stem |
| Passes through | Gold and Amethelis only |
| Blocks liquid / gas / player | No / No / Yes |
The Tricky Part: Making Wet Seeds
"Wet Seeds are created by combining Seeds with Water" — your Seeds come from the Kinetic Press stage of the gold loop. The catch is physics: "Unlike dry Seeds, Wet Seeds are the same density as Water, meaning they can remain suspended in the water instead of sinking. This can make effective Wet Seed production a difficult challenge."
Two properties help you handle them. Wet Seeds are less dense than dry Seeds, so a mixed pile separates naturally. And they are launchable (density 100, Slushy), so Launchers can deliver them onto the boxes.
Harvesting Flowers
"Each Flower is made up of a stem of Vine and a head of 4 Amethelis and 1 Gold." Flowers are "destructible by weapons or Fire to drop Gold and Amethelis" — burn them or shoot them, then collect.
The machine itself does the sorting: "The only solid pixels that can pass through the Planter Box are Gold and Amethelis." Harvested output falls through the box while everything else stays out.
A small UI quirk from the wiki: hovering over a plant's head before destroying it shows only "?" as the tooltip — that is normal.
Planter Box Setup Checklist
- Make the input: bring Seed pixels into direct contact with Water to create Wet Seeds.
- Deliver the seed: make a Wet Seed touch the Planter Box; the official mechanic says that contact grows a Flower.
- Harvest: destroy the Flower with a weapon or Fire to release its documented Gold and Amethelis.
- Collect below: the box allows Gold and Amethelis solid pixels to pass through, so leave collection space under it.
This is a source-backed sequence of interactions, not a claimed end-to-end automation blueprint. Growth time, queue capacity and a tested automatic harvesting layout are not documented.
Community Finding: Leave Room for Queued Flowers
In a side-by-side Planter Box test, Takovacs attributes a deterministic-output explanation to developer Lantto: each committed Wet Seed still produces its Flower, but the output can wait when the chamber has no physical growth space. Enlarging the chamber releases the queued growth.
This is useful troubleshooting evidence, not a captured official specification. If Seeds appear to vanish, expand the space above and beside the Planter Box before changing the input ratio.
Contain the Farm Without Choking It
A separate beginner discussion recommends enclosing Flower production so loose Seeds and growth do not spread into unrelated factory lanes. Other players in the same discussion warn that very small enclosures can stall growth.
The combined design rule is practical: use a dedicated, enclosed Flower chamber, but make it tall enough for queued growth and give harvested material a separate exit. Containment and output space solve different problems; you need both.
Community Layouts to Test (not universal recipes)
Recent seed-wetting builds report three repeatable ideas: keep the reservoir Pump above the wetting outlets, hold a thin water layer over a Filter that passes Wet Seed, and use a Sensor to prevent water backing up into the seed route.
These are player experiments, not official throughput specifications. Reproduce them in a small chamber before scaling: water-system test, seed distribution build, and seed-wetting troubleshooting.
What We Cannot Confirm Yet
- Growth time per Flower and the exact capacity/rules of the creator-reported output queue — no official numbers (unverified).
- Placement cost of the box itself beyond the research unlock (unverified).
- Automated end-to-end farm layouts — the wiki documents the pieces, not a full build; our in-game capture is planned.
Planter Box FAQ
Is the Sandustry planter called a Planter Box?
What do you put on a Planter Box?
What does a Flower produce?
Why do Wet Seeds stay suspended in Water?
Is there a verified automatic Planter Box layout?
Verified harvesting behavior
Flowers can be destroyed by weapons or Fire, and the resulting Gold and Amethelis can pass through the Planter Box. The sources do not document a safe, fully automatic fire-row layout.
Gold Production
Where the Planter Box sits in the full loop.
Kinetic Press Guide
The stage that supplies your Seeds.