The Auction in Grow a Garden 2

The Auction is run by the Auctioneer NPC at the Auction Stand.

Each lot opens at a high price and drops by a set percentage at a fixed interval, until it either sells, expires, or reaches its minimum price.

Buying early costs more. Waiting risks losing the lot to someone else. That tension is the whole mechanic — there is no bidding, only timing.

The game computes the current price as the start price minus a fixed decrement per elapsed interval, floored at the lot's minimum.

The game's own mechanics documentation gives the current price of a lot as:

current = max( minPrice, startPrice − round(startPrice × decrementPercent ÷ 100) × floor((now − rolledAt) ÷ decrementInterval) )

In plain terms: the price drops by a fixed amount — a percentage of the START price, not of the current one — every time an interval elapses, and stops at the lot's minimum. Because the decrement is computed from the start price, the fall is linear rather than tapering, so waiting is worth the same at every stage until the floor.

Four values drive it: start price, decrement percent, decrement interval and minimum price. None of the four is published — not in the game's files and not in any source we can trace — so we cannot tell you how fast a given lot falls. The shape is known; the constants are not.

Lots rotate every 30 minutes and can include Seeds, Crops, Pets, Gears, Crates, Seed Packs and Eggs.

That makes the Auction a genuine alternative route to items with brutal shop restock chances — the Hypno Bloom, for instance, appears here as well as in the Seed Shop.

Some lots carry a limited quantity, shown on the listing. Once the stock is bought out or the lot expires, no further purchases are possible.

So a cheap lot with one unit remaining is a race, while one with several is a waiting game.

For a common lot with stock remaining, waiting is close to free — the price only falls.

For something rare with a single unit, the calculation inverts: the price you see may be the highest you will ever pay and also the only chance you get.