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Local News

Fall is for tree planting: Here’s how to do it right

Fall is a great time of year to plant trees. When you're ready to dig, Kari Houle, University of Illinois Extension horticulture educator, suggests digging a hole that is two to three times wider and no deeper than the root ball.
Fall is a great time of year to plant trees. When you're ready to dig, Kari Houle, University of Illinois Extension horticulture educator, suggests digging a hole that is two to three times wider and no deeper than the root ball.

Fall is coming, and that means it’s a great time to bring home a new tree. But before they do, homeowners should repeat the mantra “right plant, right place,” according to Kari Houle, University of Illinois Extension horticulture educator.    

“If you have space for a tree that can only be 30 feet tall, don’t choose a tree that is 50 feet tall and hope that you can keep it pruned 20 feet smaller,” Houle said. “Determine how much space you have available and what your soil conditions are, then find a tree that is suitable to that planting space.”

Even though fall is a great time of year to plant trees, there are some trees that are best planted in spring.

According to Houle, the following trees are best planted in spring, as they are slower to root out: red maple, birches, dogwoods, tulip tree, various oaks, Japanese zelkova, willows, any stone fruits, such as cherries and peaches, magnolias and bald cypress.

Before digging, Houle recommends making a utility line-marking request with JULIE (800-892-0123 or www.illinois1call.com). It’s a free service, but requires a 48-hour minimum notice between submitting a request and beginning to dig.

“Not only is it Illinois law to call before you begin digging, it is also for your safety and prevents disruption of utility services,” Houle said.

When ready to dig, Houle suggests digging a hole that is two to three times wider and no deeper than the root ball. Digging a hole deeper and then filling it back in will only cause the soil to settle and, over time, can cause tree stress, girdling roots, early fall coloration and reduced growth rate, and can eventually lead to tree decline and death.  

“If by chance the tree has been grown too deeply in the pot, which can happen, you should examine your tree for that before you dig the hole,” Houle said.

Remove excess soil from the tree until the basal root flare is exposed, then dig the planting hole. 

In heavy clay or heavily compacted soils, Houle suggests planting the tree a little higher by a few inches to help with drainage and digging the hole three to four times wider than the root ball.   

When planting a burlapped tree, place it in the planting hole and remove all twine and the wire basket and burlap as far down as possible. Any burlap left above ground acts as a wick, removing water from the ground. If left intact, the twine can girdle and damage the tree.

“When you go to backfill the planting hole, use the soil you dug up. There is no need to amend the soil,” Houle said. “Amending the planting hole with organic matter doesn’t encourage outward root growth.”

Once the tree is planted, water well every five to seven days, depending how fast the soil is drying out. 

“Checking soil moisture every few days is helpful to determine whether it’s time to water. Using a soaker hose can make watering easier,” she said.

To further reduce moisture loss from the root ball, mulching a newly planted tree, or any tree for that matter, can provide huge benefits. Mulch helps to reduce moisture loss, moderate soil temperatures, add organic matter back to the soil over time, and prevent lawn mower damage to the trunk of the tree.

“Choose an organic mulch, such as cypress, hardwood shredded, arborist chips, or the like. Rock mulches don’t provide the same benefits as organic based mulches do,” Houle said.

Only stake trees in high traffic or windy areas. Most trees, especially smaller-diameter trees, don’t need to be staked. If they are, make sure to remove the staking material within a year after planting.

Contact your local Extension office for information on proper staking and for additional information on trees and tree care.

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