It is a process in which a part of the plant body gets detached and develops in to a new independent plant.
In lower plants it occurs through binary fission, budding, fragmentation, gemmae, resting buds, soredia (in lichens) etc.
In higher plants, any part of the body maybe capable of vegetative propagation. Many plants produce modified stems, roots, and leaves, specially for natural vegetative propagation. At the same time, man too has developed various methods of artificial vegetative propagation for many useful plants.