How long can a full grown tree survive without rain?

A fully grown tree can typically survive without rain for several weeks to months, depending on its species, health, and environmental conditions. Trees with deep root systems can access underground water reserves, allowing them to endure longer periods of drought. However, prolonged lack of rainfall can stress the tree, leading to leaf drop, reduced growth, and increased susceptibility to pests and diseases. Ultimately, if drought conditions persist, the tree may face significant health risks or even die.