Vegetative propagation produces new batches from the same original plant material across multiple planting cycles. It requires repeated selection of source plants where each cycle depends on maintaining healthy parent stock and any decline in vigor carries forward into new batches. It accumulates performance limitations over cycles where reduced growth strength, lower yield potential, or stress sensitivity persists in successive plantings without renewal from new plant lines.
Also check it out advantages and disadvantages of vegetative propagation for more information.