All Tradescantias need plenty of light to retain the variegated colors on the leaves. Long spaces between leaves are caused also by too little light. Pinch off leggy stems and move your plant to a brighter spot. Leaves will also lose their variegation if they don't get enough light

Tradescantia does not like to get too wet. You can let the soil dry out a little before you water again.

Too much light is provided Tradescantia's leaf scorching is the end result.

Pinch stems back often to encourage branching and to keep the Tradescantia from getting too leggy. The best time to prune is in spring and summer, during the growing season. You can easily propagate the stem cuttings for more plants.