Basil is easy to propagate from cuttings. Just use kitchen scissors or a sharp knife to clip a two- to three-inch sprig just below a leaf node (where new leaves are starting to grow). Pull off any larger leaves next to these new ones, and submerge the node in a jar of water. Place the jar in a sunny windowsill and change the water every other day. Within a week, you’ll see roots emerge. Once those roots have grown about two inches, the herb is ready to plant outside or in a pot.