Green Birch Sapling can be found growing near birch trees and in a variety of wild landscapes, usually in groups of 2-5.
Green Birch Saplings can be harvested with a Hatchet, Improvised Hatchet, or a Hacksaw. Where the green Birch Sapling used to stand, a small root stump will remain, though this stump cannot be interacted with and will not regrow. Tools do not suffer condition loss for harvesting saplings.
A Green Birch Sapling can be cured by leaving it to dry indoors or inside a deep cave for four days. Note that the sapling will continue to cure when placed inside a container, but will be ejected when fully cured. During this time, if the sapling is curing it will show the percent of the process completed, either when hovering over the sapling or viewing it in one's inventory.
Once dried, the green birch sapling will become a cured birch sapling and will appear to be a more dull brown colour. The cured sapling can then be used for crafting Arrow Shafts. Both Green and Cured Birch Saplings do not Decay, and will always be at 100% condition.
2 Green Birch Saplings are required to craft the Trader blueprint item the Bushcraft Bow, being the only tool in the game requiring the uncured saplings.