Overwatering is a common and serious problem that can affect the health and survival of bonsai trees. Overwatering means giving the bonsai more water than it needs or can absorb, resulting in soggy soil and suffocated roots. Overwatered bonsai trees may show symptoms such as yellowing or browning of leaves, wilting of branches, mold or fungal growth, root rot, and leaf drop. To avoid overwatering, it is important to check the soil moisture regularly and water only when the topsoil feels dry to the touch. It is also advisable to use a well-draining soil mix and a pot with enough drainage holes. Overwatering can be reversed by repotting the bonsai in fresh soil, pruning any damaged roots or branches, and reducing the watering frequency until the tree recovers.