To propagate sticks on fire euphorbia, you can take stem cuttings from the plant. Choose a healthy stem and make a clean cut just below a node. Remove any leaves from the bottom of the cutting and allow it to dry for a few days. Plant the cutting in a well-draining soil mix and keep it in a warm, bright location. Water the cutting sparingly, allowing the soil to dry out between waterings. Roots should develop within a few weeks, and you can then transfer the new plant to a larger pot or garden bed.