Cropping Practices for Hybrid Poplars

Weed Control

Hybrid poplars need good weed control for the first three to four years. Once the hybrid poplar canopy is well developed, its shade is very effective in eliminating further weed competition until harvest.

Weed and grass control may be accomplished by the use of labeled herbicides and by cultivation. Common farm equipment can be used to perform both chemical and mechanical weed control operations. A person familiar with the application of herbicides in short rotation forestry should be consulted on the use of specific herbicides and cultivation practices to ensure good results.
bulletThe most successful weed control is a result of good site preparation.
bulletIf a pre-emergent herbicide is used, get instructions from a person familiar with herbicide use on young trees.
bulletCultivation will be necessary, but must be shallow, and done with care to avoid root pruning.

Eighty percent of the young tree's rooting occurs in the top 12 inches of soil, so shallow cultivation is required to avoid root pruning. Do not till deeper than two to three inches. Only recommended herbicides should be applied to the soil near the trees. Some herbicides may cause stunting of root growth.

Eighty percent of the young tree's rooting occurs in the top 12 inches of soil, so shallow cultivation is required to avoid root pruning. Do not till deeper than two to three inches. Only recommended herbicides should be applied to the soil near the trees. Some herbicides may cause stunting of root growth.

A field of 2-month old hybrid poplar in Norman County Minnesota.
A field of 2-month old hybrid poplar in Norman County Minnesota.

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 Last updated April 25, 2001.