Vegetative propagation is not good because there is no genetic variation so there is less adaptability to the environment.
Vegetative propagation is a type of asexual reproduction in plants where a new plant originates from a parent plant fragment or from a specific breeding system derived from the base, root or leaf. Cutting, layering and grafting are some types of vegetative propagation.
Disadvantages of vegetative propagation
The main disadvantage is the potential to influence on biodiversity of a species. If a particular plant clone is sensitive to certain diseases, there is possible to lose entire crops, such as the influence of kiwifruit disease Psa.