Oklahoma State University

Weed Control Before Planting

A weed-free seedbed is important for stand establishment because switchgrass seedlings do not compete favorably with weeds for water, sunlight, and nutrients. Clean tillage and firming the soil during the fall before planting is a good starting place. This should control both annual and perennial weeds, as well as provide a favorable environment for seed germination. If phosphorus fertilizer or lime is needed, it is a good idea to incorporate them in the fall before planting, leaving the seedbed in good condition. Light tillage may be needed during late winter or early spring, followed by rolling to firm the seedbed. Otherwise, weed control within a few days of planting is an important activity.

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