How can cutting and layering be used to propagate plants?

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In horticulture, cutting and layering are forms of asexual propagation used to produce new plants that are clones of the parent. These methods rely on the plant's ability to regenerate missing parts, such as roots or shoots.123

Cutting

Cuttage involves detaching a section of a plant—typically a stem, leaf, or root—and placing it in a moist medium like sand, peat moss, or vermiculite to induce rooting.123
* Process: Once the cutting develops its own root system, it grows into an independent plant.24
* Optimization: Success depends on factors like light, temperature, and humidity. Growth hormones, such as synthetic auxins, are often applied to the cut surface to stimulate root development.31

Layering

Layering induces a plant to regenerate roots while the section remains attached to the parent plant.53
* Soil Layering: Lower stems are bent to the ground and covered with moist soil until roots form, at which point the stem is severed and transplanted.15
* Air Layering: A branch is wounded (often by slitting), wrapped in moist material like sphagnum moss, and kept moist until roots appear. The branch is then detached and potted.15