To propagate a hemlock tree, the most common method is through layering, where you bend a low branch of the tree down to the ground, partially bury it in soil, and secure it in place until it develops roots; you can also propagate hemlock by taking semi-hardwood cuttings in late summer, dipping the base in rooting hormone, and planting them in a pot with well-drained soil, keeping them in a partially shaded area until established; seed propagation is also possible, but requires a stratification process to mimic natural conditions for germination.
Key points about propagating hemlock:
Best method: Layering is generally considered the easiest and most successful method for propagating hemlock trees.
Timing: Take cuttings in late summer when the new growth is semi-hardwood.
Cuttings: When taking cuttings, ensure they have a few nodes and dip the base in rooting hormone.
Soil conditions: Plant cuttings in a well-drained potting mix and keep the soil moist but not soggy.
Light requirements: Place potted cuttings in a partially shaded area.
Seed propagation: If propagating from seed, collect cones when they are mature, stratify the seeds to break dormancy, and sow them in a seed starting mix.