Because of strong adhesion , a property of water which directly contributes to capillary action.
<h3>What is adhesion and what is capillary action?</h3>
See in the plants there is always a need of cohesion and adhesion as we all know already which is the only way water can be up to the plants aerial parts.
Though there are two more ways called transpiration pull and root pressure theory.
Cohesion is the property of water which depicts its attraction properties.
Adhesion is the property of the water which mean water molecules can stick to other particles or molecules.
And is the same reason that is adhesion which gives a boost to capillary action.