Question

Why theres a need of vegetative propagation in plant?

Answer 1

Asexual or vegetative plant propagation. Asexual plant propagation methods produce new plants from vegetative parts of the original plant, such as the leaves, stems and roots. ... Many plants can reproduce this way naturally, but vegetative propagation can also be artificially induced

Answer 2

Vegetative propagation is important because not plants are able to perform direct or indirect sexual reproduction. It allows the plants to reproduce with its roots, stems, leaves etc.
Hope it helps you.