Earthing up means piling soil around the base of a plant. It can be done by hand or by using a hoe or spade.
Earthing up stabilises stems of saplings, which are easily disturbed by winds.
Soil around the sapling is used for earthing up. In the process, a basin, or circular hollow is created around the sapling. The basin is used for regular watering of the sapling; the basin entraps as much water as possible in the immediate root zone.
The basin is also used for mulching. It should always be free from weeds.