Capillary action is possible due to COHESION property of water.
Capillary action is defined as the movement of water within the spaces of porous materials due to the forces of cohesion and adhesion. Cohesion refers to the tendency of water molecules to stay together while adhesion refers to tendency of the water molecules to be attracted to other substances. In plants, capillary action moves water and the nutrients dissolved in it from the roots of the plants to the leaves in the branches.