Even if their purpose is the same, spike and plug aerators do come with a few differences and each type is more suitable for certain conditions. Spike aerators feature a roller with several solid spikes that puncture the soil to create space for water, air, and nutrients to reach the lawn’s roots.
Plug aerators, also known as core aerators, feature hollow tines that remove plugs of soil and leave gaps in the lawn soil. This helps the roots access air, water, and other nutrients. Core aerators are usually employed for soils with a high clay concentration. Spike aerators might compact this type of soil even further since the solid tines they feature push into the ground.
Both types of aerators come with advantages, yet spike aerators ensure more of a temporary benefit. However, in order for both types to be effective, the aeration process should be carried out in specific conditions.