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Preemergent Herbicides for Tree Plantation (IL)

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From: Jeff Zimmerman
Germantown Hills, IL
Could you provide some information, brands, of pre-emergent herbicide that I can use safley in my tree plantation. I have spruce, white pine, bur and red oak growing. All were planted this spring in a old field. I have used mechanical methods thus far, but want to use a herbacide after the next cleanup of weeds. Any advice would be helpful. Also, can the pre-emergent herbicide be sprayed over the trees, as I want to treat rows.


Jeff Zimmerman

Extension Message
From: Jay Hayek
Extension Specialist, Forestry
Department of Natural Resources and Environmental Sciences
Greetings Jeff:

Yes, there are some preemergent herbicides that are labeled for tree planting practices.

Some of the common preemergent herbicides I am familiar with include:

Pendulum (many annual grasses and certain broadleaf weeds)

Oust (pre- and post emergent; some annual and biannual grasses and broadleaf weeds)

Simazine (many annual grasses and certain broadleaf weeds)

You are required by law to follow the directions on the label of these herbicides. The aforementioned herbicides 'may' be applied directly over the top of “dormant” trees, but not over the top of “leafed-out” trees. Again, it is very important that you follow the directions and rates listed on the herbicide label. Some of the aforementioned herbicides are not labeled for certain tree species.

Here is a good resource from Wisconsin DNR:

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