What is layering

What is layering. This is  a method  of vegetative  production  which involves  inducing  parts of  the  stem to produce  roots  while  still on the  plant  before  they are cut off  to  be planted  elsewhere.

The   part of the plant is wounded to expose the stem cambium to give rise to roots.

The  wounding  or bending  of  the stem  blocks  downwards  movements  of           photosynthesis  which accumulate  at  the  wounded  or  bent part  to  provide  rooting.