There are two major types of lawn aerators: core or plug aerators and spike aerators. There are advantages and disadvantages to each kind. Which one is best for you depends entirely upon what matters to you.
Ease to Use and Maintain. Spike aerators are all simple devices with spikes designed to go into the ground. Whether you are slipping on some spiked shoes, pushing a spiked hand aerator into the ground, or attaching one to the back of your tractor or riding lawn mower, spiked aerators are simple to use. They can require some physical exertion and may be tiring to use for long periods of time. However, some aerators are heavy machines that must be lifted and turned to go back around the lawn or in corners. Plug aerators that are self-propelled machines with power-lift or are towed along are not hard to use, but do have more maintenance needs with more parts that must be cared for and fixed or replaced.
Price. The cost of each varies widely, but spike aerators are generally significantly cheaper, priced from $10 to around $500, while plug aerators typically cost a few hundred to several thousands of dollars. If you only need it infrequently, renting a plug aerator instead of buying one can be cheaper. The lower price is the greatest advantage of spike over the other types of aerators.
Performance. While spiked rolling drums and spike towing aerators can do a pretty decent job, other aerators do a better job breaking up compacted soil and roots. The small holes made by spiked aerators close quickly, often with the first watering, so the roots enjoy the benefits for a shorter period of time and aeration needs to be done more frequently. In problems areas such as heavily-compacted or clay soils, spiked aerators may not be able to get into the ground deep enough to make a significant difference. Instead of solid spikes, plug aerators have hollow tines that penetrate deep into the ground and pull out a dirt core, leaving the plug on the surface where it slowing breaks up. The tines break-up compacted soil and dense roots, leaving new root growth with better access to water, air and the nutrients. Deeper, healthier roots mean a greener, healthier lawn that can handle drought and heat better as well as being more disease and weed-resistant.
Consider your lawns’ needs, the amount you would like to spend and the time and effort you want to put into aerating, and then choose the aerator that is best for you.
Husqvarna YTH2042 