[header] How to divide rhubarb plants [title] Plan to divide the rhubarb in early spring or late fall. [step] Early spring makes it easier to see new growth, but it is more stressful for the plant. This means that the new divisions may have a harder time adjusting and taking root. 
Late fall makes it harder to see new growth, but it is easier on the plant. This means that the plant is more likely to recover..