Prodiamine
One of the most effective and long-lasting pre-emergent herbicides available. Prodiamine (sold as Barricade) provides up to 4–5 months of weed prevention and is effective against crabgrass, goosegrass, and dozens of other annual weeds.
Prodiamine is considered the gold standard pre-emergent by many lawn care professionals. Its long residual activity means a single spring application can protect through most of the crabgrass germination period, and split applications (half in early spring, half 4–6 weeks later) provide season-long control.
Duration: 4–5 months of soil activity — longer than most alternatives.
Application: Requires watering in within 21 days of application. Best results with immediate irrigation.
Split application strategy: Applying at half rate in early spring and the remaining half 4–6 weeks later widens the protection window and is especially useful in warm climates where crabgrass germination continues into early summer.
More on Pre-Emergent
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