To propagate Trout Lily, the most reliable method is by dividing the offset corms in late summer, after the leaves have yellowed, as this plant is quite difficult to grow from seed and takes a long time to flower when propagated that way; simply dig up the plant, carefully separate the smaller corms from the main clump, and replant them at a depth of around 4 inches with good mulch. 

Key points about propagating Trout Lily:

Propagation method: Primarily through division of corms. 

When to divide: Late summer, after the foliage has died back. 

Seed propagation: Possible, but not recommended as it can take several years for plants to flower from seed. 

Important consideration: Avoid disturbing the plants too much as they don’t transplant well. 

Steps for propagating Trout Lily by division:

Mark the location: In early spring, mark the plants you want to divide so you can easily locate them later. 

    Dig up the clump: In late summer, carefully dig up the entire plant, ensuring you get as much of the root system as possible. 

    Separate the corms: Gently separate the smaller offset corms from the main corm, making sure each new corm has at least one growth point. 

    Repot the divisions: Plant the divided corms in a new location with well-draining soil, burying them about 3-4 inches deep. 

    Mulch well: Apply a layer of mulch around the newly planted corms to retain moisture.