3 minute read
Understanding Trees: Tree Planting
[Part 2]
Most Urban Trees Are Planted Too Deep
Planting trees correctly is the difference between success and death. This cannot be overstated. The most important factor when planting a tree is positioning the root crown two inches above grade after settling.
To achieve this, water your tree before starting the planting process, then dig the planting hole about two inches less than the rootball is deep or about twelve inches for a standard 15-gallon container. Dig the planting hole at least three feet in diameter (wide). You can loosen the soil depth beyond where the rootball will sit if your soil is hard or compacted. Planting sites can vary in soil type, fertility and grade. Take this into consideration before planting.
After digging the planting hole, lay a two-inch diameter tree stake across the planting hole making sure it is resting on the original or final grade.
Measure the distance from the bottom of the hole to the top of the stake. This measurement should be about two inches less than the depth of the rootball. Some adjustments may be needed, especially if the rootball falls apart.
Fill the planting hole halfway with water before taking the tree out of the container. Quickly and efficiently take the tree out of the container and loosen the circling roots on the sides and bottom.
Planting the tree is easier with two people. One person sets the rootball into the planting hole, holding it upright while the other person insures it is two inches above grade.
I find it easier to use a level and tape measure. With the bubble set at level, with one end on the rootball, measure the distance from the original grade to the bottom of the level. This should be two inches.
Backfill the planting hole after setting the tree at the proper height. Add soil amendments if you like but it usually is not necessary.
I like to install three stakes and three to six flexible ties to support the trunk. After two or three years the tree should be able to stand upright on its own. If it can, remove the ties and stakes.
Most people think at this point they are done. However, it is quite the opposite. Your work has just started. Check on the tree daily for proper amount of moister in the rootball. It will be several months to a year before the tree is established. During this time, it is critical to monitor the tree and make minor adjustments as needed.
Your job has just begun. Look for my post planting tree care tips in the next issue of Synkd
Read [PART 1]:
Listen to the SYNKD on air podcast with Scott:
Scott Seargeant
Seargeant Landscape & Arboriculture
Scott is an award-winning international arborist and California landscape contractor in the Central Valley.
