Beyond planting and harvesting, Build A Ring Farm has two systems that quietly boost your progression: contracts and the composter. They’re easy to overlook, but together they turn surplus crops and routine play into extra fertilizer, cash and speed-ups. This guide explains how both work and how to use them. For where they fit in the bigger plan, see how to make money fast.
What the composter does
The composter converts surplus harvested crops into fertilizer. Instead of letting extra produce pile up unused, you feed it into the composter and get growth-boosting fertilizer back — a renewable supply that speeds up your future harvests. This is especially valuable because fertilizer is otherwise a limited resource from shops and codes; composting makes it something you generate continuously just by farming. To understand what that fertilizer does, see the fertilizer guide.
Why composting matters
The composter creates a virtuous loop: more harvests produce more surplus, which composts into more fertilizer, which speeds up growth, which produces more harvests. For a farm that’s always planted (as it should be), this is essentially free acceleration. It pairs naturally with the Sprinkler upgrade — the Sprinkler gives steady baseline growth speed, while composted fertilizer lets you rush specific high-value crops or hit event timing. Don’t let surplus crops sit idle when they could be feeding the composter.
What contracts are
Contracts are in-game tasks that ask you to deliver certain crops or meet specific goals in exchange for rewards. They function as a steady secondary income stream layered on top of normal farming: complete a contract, collect cash, fertilizer or speed-up rewards, and move to the next. Because the crops you’re growing anyway often satisfy contract requirements, fulfilling them is frequently a matter of routing your existing harvest rather than going out of your way.
How to make the most of contracts
A few habits help you squeeze value from contracts:
- Keep diverse crops growing. Contracts may ask for specific produce, so a varied farm fills more of them without extra effort.
- Prioritise contracts you’re close to completing with crops already in rotation.
- Bank the speed-up rewards for your slowest, highest-value crops, where shaving grow time matters most.
- Treat contract cash as bonus reinvestment fuel — funnel it into Saw and Sprinkler upgrades rather than spending it idly.
Contracts won’t carry your economy, but as a passive bonus on top of farming you’d do anyway, they add up.
Composter and contracts together
These two systems reinforce each other. Composting your surplus keeps a steady fertilizer supply flowing, which speeds up the crops you need for contracts, which reward you with more resources — including, sometimes, more fertilizer and speed-ups. Run them as a background loop: harvest, compost the excess, fulfil contracts with what you’re growing, and reinvest the rewards. None of it requires active micromanagement once you’ve set the rhythm.
Common mistakes with contracts and composting
A few habits waste the value these systems offer. Letting surplus crops sit unharvested means nothing to compost — keep plots cycling so there’s always excess to convert. Composting your only copies of a valuable crop instead of surplus is another slip; compost the overflow, not the crops you want to sell or replant. With contracts, chasing ones that demand crops you don’t grow wastes effort — favour contracts your current rotation already satisfies. And don’t ignore the rewards: speed-ups and fertilizer left unclaimed are free acceleration you’ve earned. Treat both systems as low-effort background loops, and the value accrues on its own.
Where they fit in your progression
Contracts and the composter are mid-layer systems — not as impactful as your seed tier, ring placement or Saw level, but meaningful free value that compounds over time. Set them running in the background while you focus on the big levers: climbing seed tiers, optimising farm layout, and stacking mutations. The composter ensures you’re never short on fertilizer, and contracts turn routine harvests into bonus rewards. Together they’re a quiet efficiency boost that separates an optimised Build A Ring Farm save from a wasteful one.