‘培土’ is a verb meaning to mound or heap soil around the base of a plant—typically to support its stem, protect roots from exposure, retain moisture, or encourage new root growth. The character 培 (péi) means 'to cultivate' or 'to foster', often implying nurturing effort, while 土 (tǔ) means 'soil' or 'earth'. Together, they form a compound that specifically describes this horticultural action, not just general soil handling. It’s commonly used in gardening, farming, and botanical contexts, especially when caring for young seedlings, transplanted saplings, or crops like potatoes or tomatoes that benefit from earthing up.

This term emphasizes intentional, beneficial intervention—not random digging or piling. It’s frequently paired with objects like 苗 (seedlings), 树苗 (saplings), or 蔬菜 (vegetables), and often appears in instructional texts, agricultural guidelines, or gardening blogs. Unlike broader terms like ‘松土’ (loosening soil) or ‘翻土’ (turning soil), ‘培土’ always implies upward movement and encircling the plant base.