To propagate red hot poker, the most common method is to divide the plant in the spring by digging up the clump and carefully separating the offsets (smaller plants) that grow around the mother plant with a sharp spade, ensuring each new division has a good root system, and then replanting them individually; this is the best way to create new red hot poker plants as they don’t typically tolerate being moved often. 

Key points about propagating red hot poker:

Best time to divide: Early spring 

Method: Dig up the clump, use a sharp spade to slice through the root ball, separating the offsets with roots attached. 

Replanting: Place the divided plants in a similar location with the crown level to the soil surface. 

Considerations:

Red hot poker can take a few years to bloom after division. 

Dividing can stress the plant, so only do it when necessary to prevent overcrowding.  Ensure each new plant has a good root system