To propagate meadow rue, the most reliable method is by dividing established plants in early spring, as new growth begins, by digging up the root clump and separating it into smaller sections to replant; starting from seed is possible but can be lengthy and unreliable due to slow germination rates. 

Key points about propagating meadow rue:

Propagation method: Primarily by division of established plants. 

Best time to divide: Early spring, when new growth is just starting. 

Division process: Dig up the entire root clump, carefully separate into smaller sections with healthy roots and crowns, and replant immediately. 

Seed propagation: Can be done by sowing seeds in spring or fall, but germination can be slow and may require cold stratification. 

Considerations: Meadow rue plants should be at least three years old before dividing. 

Avoid disturbing the roots too much as meadow rue doesn’t like being transplanted.  When planting seeds, consider direct sowing in the desired location.