Clay soils

It is important to distinguish between a slow or poorly drained clay soil and one that is waterlogged.  This depends on: the depth of clay, the amount of sand or silt or loam mixed in the topsoil, the presence of drainage pipes, the type of subsoil and underlying rock, the water table height, the amount of compaction and the amount and distribution of rainfall.

If the soil is slow to drain or has occasional surface water during winter but drains the rest of the year then all species of eucalyptus will grow.  If water is present on the surface for longer than this grow those species that are tolerant of waterlogging.