[header] How to divide a spider plant [title] Prepare your work area to make cleanup easier. [step] Spread newspaper or plastic down on your work surface to catch soil spills. [title] Put 3 or more inches (7 cm) of soil in each pot. 
[step] You may need to add more later, depending on the size of the pot and root ball. The soil in the bottom should raise the base of the plant to surface level and allow ample room for plant growth.