Hothouse Formula is an in-game grow booster. One use removes 3 hours from each currently running production batch and adds 6 hours to your booster cooldown budget.
| Property | Value |
|---|---|
| Time removed per running batch | 3 hours |
| Booster cooldown added | 6 hours |
| Uses per item | 1 |
The effect includes running production batches in other cities. A batch with less than 3 hours remaining becomes ready immediately. Already-ready batches are unchanged, and unused reduction does not carry into later batches.
It does not accelerate processing jobs, increase yield, start batches or collect their output. Collection rules and bust risk remain in place.
Start the production batches you want to accelerate before using the Inventory action. If none are running, the use is rejected without consuming the item.
A booster use is allowed while the current remaining booster budget is below 24 hours. The full 6-hour cost is added after that check and can push the total above 24 hours. Further uses then wait until it drops below that threshold.
All booster-group items share this pool; switching products does not bypass it. Medical and drug cooldowns are separate. Compare the remaining batch times and the other boosters before committing your cooldown budget.
Game-item effects checked against executable code and current item migrations on 17 September 2026.