Trees

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For a humorous rendition of this page, see Trees/Humor .

Trees are a type of plant. They can either be native to the biome or planted by the player in a growing zone. Vulnerable to fire and when burnt, they leave behind burnt trees. Cutting them down yields wood a resource to craft weapons and feed the fueled generator. Other uses include flooring and building furniture. While in real life Cacti and Bamboo technically aren't trees, in Rimworld they are included in this category.

  • Teak, Cecropia, Palm and Bamboo are native to Tropical biomes.
  • Oak and Poplar are native to temperate biomes.
  • Cacti and Poplar are native to Arid biomes (only Cacti in Extreme Desert). Cacti are unique in that they have a fertility sensitivity of 0% and minimum fertility of 5%.
  • Birch and Pine are native to colder biomes (barring Ice Sheet and Sea Ice).
  • Cocoa is not native to any biome.

Ecosystem

Trees are natural food source for Alphabeavers and Thrumbos.

Farming

Trees that are native to your colony's biome may be planted once Tree sowing has been researched by growers with a Plants skill of 6+. However, growing Cocoa trees requires further research and may be planted by growers with a Plants skill of 8+. Growing trees are little different from other crops in that trees require at least a one tile distance from your other crops as well as each other, including wild trees. Farmers will automatically cut back wild trees for this. Native trees are immune to blight, but it may affect Cocoa trees.

No trees may be grown under roofs. This means that trees may not be grown in completely closed greenhouses. They may only be grown in greenhouses with roofs open in a grid pattern, that leak a lot of temperature-controlled air.

Temperature

If the ambient temperature drops below freezing, trees will cease to grow until back into their comfortable range again (including Pine trees that are native to cold biomes). Some trees will instantaneously shed all of their leaves at -2°C, while sturdier specimens will hold out until -10°C. This range differs from tree to individual tree. If the temperature remains at a comfortable level for at least a day, their leaves will magically reappear.

Harvest

At 40% growth it is possible to obtain 50% of their coveted yield. Cacti can be cut at 20%. Note that the Growth Time in the below table assumes 24hr growth. Trees don't grow between 19h and 6h. Note that environmental factors such as temperature and light levels further negatively influence growth speed.

Cover

Trees can be used for cover at 25% efficiency.



Comparison table

Tree Grow Days Real Grow Days Harvest Yield Wood per Day*
Oak tree 30 51.82 45 0.87
Cypress tree 35 60.55 43 0.71
Maple tree 25 43.25 25 0.58
Drago tree 15 26 25 0.96
Saguaro cactus 5 8.64 15 1.74
Poplar tree 15.05 26 30 1.15
Pine tree 20 34.55 27 0.78
Birch tree 20 34.55 27 0.78
Teak tree 32.5 56.14 54 0.96
Palm tree 14 24.22 18 0.74
Bamboo tree 12 20.76 13 0.63
Cecropia tree 14 24.18 18 0.74
Willow tree 13 22.46 17 0.76

*Wood per Day is calculated as Harvest Yield divided by Real Grow Days.