A plant node, also known as a leaf node or stem node, is the part of the plant that causes leaf growth. Nodes are located along the plant's stem. Finding plant nodes is important to effective pruning maintenance and also to regenerating plants by planting new roots.
Cutting a plant just above the node during regular pruning allows the plant to open up with full, lush leaves. When attempting to start a new plant from a stem, the area below the node is important to include because it allows good root growth. The peticle is the area of a plant that extends out from the node.