Composter

Production Island farm

A small, unassuming building that makes sense for anyone growing plantations and fields side by side on the Island farm – without it tropical leaves just take up storage space.

Quick overview

Farm	Island farm
Category	Production
Size	6 × 5
Max level	4
Price	30 000 Island dollars
Build time	20 min
Workers	3
Priority	Build early

What it's for

The composter makes tropical fallen leaves into island humus. When used, island humus increases the harvest from island fields.

The composter recycles the tropical leaves that every island plantation drops on you as a by-product and turns them into island humus. Humus then raises the yield from cultivated island fields, so this building connects the plantations with field farming on the Island farm. It takes up a 6x5 area and you buy it in the Shop along with the other island buildings. It's for anyone who works fields on the Island farm and doesn't want tropical leaves lying around unused.

When to build it

It makes sense to build the composter as soon as tropical leaves start piling up from your plantations, because otherwise you have nowhere to put them – so build it shortly after your first plantation, not once you've got leaves stockpiled by the crateful. One composter is enough for a normal farm, because even at a higher level it still only makes one unit of humus per cycle.

Is it worth upgrading

Upgrading pays off here mainly because of leaf consumption and time, not because of output – the building still makes humus one unit at a time. At level one you need 45 tropical leaves and just under two hours for a single unit of humus, at maximum level 23 leaves and one hour are enough. That's roughly half the consumption and half the time, so the upgrade suits anyone who wants to make humus continuously instead of saving leaves for just a couple of batches.

Tip from a veteran player Don't be afraid to upgrade the composter before you actually need humus – the lower leaf consumption leaves you more tropical leaves for later use as they build up over time.

Most common mistake Players often overlook the composter and let tropical leaves just pile up, because they don't make the connection that it's a resource for field yields, not waste from the plantations.

Building levels

Level	Price	Build time	Workers	From level
1	30 000 Island dollars	20 min	3	—
2	150 000 Island dollars	50 min	5	—
3	850 000 Island dollars	2 h	7	—
4	2 500 000 Island dollars	3 h 40 min	9	—

Production at level 1

Output	Ingredients	Time	Cost	XP
60577 × 1	Tropical fallen leaves × 45	1 h 50 min	2 000 Island dollars	—

Game data, version 8052 (14. 8. 2026).

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