Why can poorly planned tree-planting projects have high seedling mortality?

Poorly planned tree-planting projects often experience high seedling mortality because they lack the necessary scientific backing and site-specific preparation required for successful establishment. When reforestation efforts prioritize the act of planting over long-term ecological health, they frequently fail to account for the following critical factors:1

• Species Selection: Seedlings that are not native to the area or are poorly matched to the specific site and its growing conditions are significantly less likely to survive. Successful regeneration requires selecting species adapted to the local climate and habitat.12
• Lack of Maintenance: Young trees require ongoing care, particularly during the first few years. Without effective weed control—which competes with seedlings for water and nutrients—or protection from insects and disease, survival rates drop sharply.2
• Poor Handling and Planting: Seedlings must be kept cool and their root systems moist throughout the lifting, storage, and transport phases. Failure to properly handle the stock or to plant it correctly (such as ensuring proper soil contact) compromises the tree's ability to establish itself.2
• Neglect of Site Conditions: Ignoring soil chemistry, drainage, or the need for symbiotic microorganisms like mycorrhizae can leave seedlings unable to access essential nutrients and water.2

Ultimately, reforestation must be treated as a long-term commitment rather than a one-time event to ensure that these projects provide genuine ecological benefits rather than serving as environmental tokenism.1