The primary producers of the temperate rain forest are the plants that use chlorophyll to create food for their growth and also for animals, explains World Builders. Green mosses and small plants cover the ground layer of a rain forest.
Among the mosses, there are wild flowers, grasses and mushrooms that cover the ground with a thick, moist and green carpet, says World Builders. The understory layer of the forest is composed of small trees and shrubs, most of which are deciduous and shed leaves during fall. Many of the shrubs, such as blackberries and huckleberries, have small, sweet berries and fruits. The canopy layer consists of coniferous trees, which produce edible seeds and provide a thick cover over the smaller trees. Their trunks and branches support blankets of moss. These primary producers make up a thick vegetation in the temperate forest.
According to the National Park Service, temperate rain forests are full of epiphytes, or plants that grow on other plants. These include mosses, spike mosses, lichens and ferns, which drape branches and trunks of trees. There are also large, old trees that are hundreds of years in age and often reach 250 feet in height and up to 60 feet in circumference.