Tree Planting Augers

Our tree hole augers are designated based on their diameter and length. Some of our heavy-duty augers are versatile enough to serve as tree augers for planting, fertilization, and aeration. Trees need to be planted at certain depths, and our tree planting augers give you the ability to quickly and easily dig holes that are big enough for trees to set their roots and thrive.

If you need to dig a tree hole with your tree planting auger, the depth of the hole depends on the size of the tree’s root ball and the type of soil you are planting in. As a general rule, the hole should be deep enough so that the top of the root ball is level with the surrounding soil and the root flare (where the trunk widens at the base) is exposed. This is usually about 2 to 4 inches above the surrounding soil. This will vary by the type of tree and its level of maturity, so you should use an appropriately sized tree auger. If you’re unsure which model is the best auger for planting trees,  this guide helps match the right size to your specific project. Or take our auger quiz and see which we recommend.

Yes. When planting a tree, the hole should generally be wider than the root ball but no deeper than necessary (see above). A wider hole gives roots more room to spread outward, which helps establish a stronger and healthier root system. Using a tree auger will make it easier to create a planting hole consistent with width and depth, reducing the risk of planting the tree too deep or restricting growth.

If a tree is planted in a hole that’s too small, it can negatively affect the development of its roots, which can damage the tree and even kill it. Therefore, when planting trees with an auger, be sure to leave plenty of room for the tree to spread its roots. Since the drill is doing most of the work, it’s easier to dig a large enough hole with your tree auger than without.

Yes, but you’ll want to use a heavy-duty auger for planting trees in this type of terrain. Rocky soil can put extra strain on your tree auger and drill, so work slowly and clear out larger rocks as you go to prevent damage. Using a tree planting auger in rocky conditions can save significant time compared to manual digging, but patience is key. By working steadily and clearing obstacles as you go, you can still create a hole that’s deep enough for a healthy root system while protecting your tool from unnecessary wear at the same time.

While a post hole digger can be used to plant trees, it often creates narrow, deep holes that aren't ideal for root expansion. Trees need space not just to grow downward, but also to spread their roots outward for stability and access to water and nutrients. A tree hole digger allows for wider, more even planting space, which helps trees develop stronger root systems.

A tree hole digger isn’t just for digging planting holes, it’s also great for the following applications:

• Fertilizing and aerating the soil around established trees
• Breaking up compacted ground
• Improving water flow
• Mixing compost directly into the root zone
• Setting posts or installing small landscape features

This versatility makes a tree auger one of the most valuable tools for both professionals and homeowners looking to save time while achieving more consistent results.