Use dithiopyr (Dimension) for pre- and early post-emergent control

What to Do

Apply dithiopyr (sold as Dimension) in mid-spring. Unlike most pre-emergents, Dimension also provides early post-emergent control on crabgrass that has already germinated up to the 1-tiller stage.

Why It Works

Dithiopyr is unique in offering both a pre-emergent barrier and early post-emergent activity. If you missed the ideal pre-emergent window by a week or two, Dimension can still catch early crabgrass seedlings that have just sprouted.

Tips

• Residual is shorter than prodiamine (about 3-4 months), so a split application is recommended.
• This flexibility makes Dimension a top choice for homeowners unsure about exact timing.
• Available in granular form from brands like Lesco and in combined fertilizer products.