What technique is commonly used for propagating plants?

Sowing seeds is a widely recognized and effective technique for propagating plants. This method involves planting seeds in an appropriate growing medium, allowing them to germinate and develop into new plants. It is fundamental in horticulture because it facilitates the growth of a variety of plant species and cultivars, promoting biodiversity. Furthermore, sowing seeds can be done for annuals, perennials, vegetables, and many other plant types, making it a versatile and widely applicable method of propagation.

The other choices do not contribute effectively to propagation practices. Overwatering the soil can lead to root rot and other detrimental conditions that hinder plant growth. Neglecting to prune does not promote healthy plant development and does not aid in propagation, as pruning is often necessary to encourage new growth or to manage plant shape. Lastly, growing in nutrient-poor soil can stunt growth and lead to poor health in plants, making it counterproductive for successful propagation. Thus, sowing seeds stands out as the most reliable technique for propagating plants in horticulture.