Can the roots of Lagerstroemia indica grow horizontally?

The roots of Lagerstroemia indica can grow horizontally. By inquiring the planting manual of Lagerstroemia indica, we can know that the roots of Lagerstroemia indica will grow laterally in the early stage of rooting. Lagerstroemia indica is a small deciduous tree or shrub belonging to Lagerstroemia of Lysimachiaceae.