Spreading and arranging the roots at the first repotting starts the process of nebari development. The best roots, at one level, are selected and those above this level are removed.

Roots thicken under the soil and acquire bark when exposed, so thin, stringy roots should be covered with a layer of soil until they thicken. A too thick root should be removed altogether. At each subsequent repotting the roots are further improved.

Thick roots below the soil are removed at each repotting.

Thick knobs at the ends of surface roots are removed to improve taper.

Crossing roots are removed to neaten the nebari.