Vegetation

Vegetation refers to the amount of plants, herbs, trees, bushes and other wildlife in the world. Out of the wastelands explored in the Fallout series (eg. Core Region), vegetation is rare and exists in the rare form of cacti and small weeds. This is because of the nuclear winters and nuclear bomb dropping making the sands of the earth an inhospitable place.

Core Region
In the aforementioned Core Region, vegetation is rare due to the amount of nuclear missiles dropped. This makes any herbs, trees or wildlife found precious to some, though worthless to others. However, by the time of Fallout 2 vegetation and wildlife have become common with many plants and herbs becoming available. However, they are by no means healthy as some will attack wanderers and some are poisonous.

Areas like Shady Sands and Vault City, however, have managed to reintroduce wildlife such as bushes, trees and grass to the wasteland. Vault City did so with their G.E.C.K, how the New California Republic managed to do so is currently unknown.

Mojave Wasteland
Due to no bombs being dropped directly at the Mojave Wasteland, plants are not uncommon. A wide variety of cacti, flowers and herbs live around the Mojave Wasteland. In New Vegas itself there is a wide variety of different plants as well as farms (Sharecropper Farms) located on the outside. In fact, in some areas, plants thrive so much that in one vault, its citizens have become part plant and attack any wanderers into the vault.