What is the maximum depth my TJ599E unit can cultivate? The Sun Joe Aardvark Electric Cultivator (TJ599E) can cultivate up to a depth of 6 inches. Related articles What is the maximum gauge of extension cord I can use to power my (TJ599E) unit? Can the blades on the 24V-TLR-LTE be replaced? Can TJ602E be used on sloped terrain or uneven ground? Can this tiller TJ602E be used effectively in smaller garden spaces or between rows of plants? Where Can I Buy Replacement Blades for my 24V-GT10 Trimmer?