> For the complete documentation index, see [llms.txt](https://project-forest-dev.gitbook.io/the-foresters-handbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://project-forest-dev.gitbook.io/the-foresters-handbook/overview/trees/soil-pits.md).

# Soil Pits

Trees need soil pits to start their journey in Project Forest.

<figure><img src="https://2743563200-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FFkyAOPgbaSb2N1dmKpUj%2Fuploads%2FiM5n4hjxYx7C7doME8Va%2FScreen%20Shot%202022-10-05%20at%202.18.39%20PM.png?alt=media&amp;token=2e9c3c55-5779-4ce9-806c-78eb05056105" alt=""><figcaption></figcaption></figure>

Trees in Project Forest can only be planted in soil pits. The first five soil pits are free, and O2 is required to reclaim more soil pits for planting more trees. Reclamation requires waiting time and cannot be stopped once the process starts. Moreover, as you reclaim more and more soil pits, the O2 requirement increases proportionately along with the reclamation time.&#x20;

In the game, the maximum number of pits currently available is 30. After all 30 pits are unlocked and planted, no more trees can be planted. However, players can use the 'Excavating' feature and remove unwanted trees and replace them with new trees.&#x20;