What does "earth up" mean?

To cover the stem or leaves of plants with soil, as to encourage root growth or protect from cold.

What is a synonym for "earth up"?

Common synonyms include: earth mound, earthing, hill, hilling, land up, mound.

verb

verb ·Rare ·Advanced level

Verb

1
To cover the stem or leaves of plants with soil, as to encourage root growth or protect from cold. transitive
"Earth up a potato crop several times during the season to encourage more tubers to grow."
2
block with earth, as after a landslide wordnet

"Earth up a potato crop several times during the season to encourage more tubers to grow."