Plants live under trees mainly because some species are adapted to the conditions created by tree canopies, despite the challenges. Trees create a shaded environment and compete for moisture and nutrients in the soil, which can make growing conditions tough. However, certain shade-tolerant plants can survive there by adapting to lower light levels and poorer soil conditions. The area under deciduous trees can allow some sunlight in early spring before leaves fully develop, aiding the growth of some plants. The tree roots take most of the moisture and nutrients from the topsoil making the soil dry and nutrient-poor, so plants that grow there often have special adaptations to tolerate dry shade and compete with tree roots for resources. Mulching and careful watering can help these plants establish under trees. Common plants that grow well under trees include ivy, lungwort, vinca, epimedium, and deadnettle. In summary, plants live under trees because some have adapted to the shade and root competition, and in some cases, the canopy allows enough light and moisture for certain species to thrive. These plants often require special care to cope with the challenging conditions created by tree roots and shade.