When to Apply Pre-Emergent in Colorado

Updated: Mar 31


One of the simplest, best things you can do for your lawn is apply a pre-emergent fertilizer in March. Pre-emergent soil amendments stop weed seeds from germinating in your lawn, flowerbeds, paths and driveways. We recommend Dave Thompson's Corn Gluten. Corn gluten meal is a byproduct of the corn milling process and a safe, non-toxic, effective alternative to chemical-based weed and feed products.

Pre-emergent should be applied in March before weeds begin to germinate. When you see the yellow Forsythia blooming, that’s your cue.

Corn gluten has a NPK ratio of 9-0-0. The nitrogen is great for feeding your existing lawn, and it also inhibits seed germination by drying out a seed as soon as it sprouts. It releases nitrogen slowly and feeds your lawn.

Quick Tips:

Corn gluten needs to be wetted after applying. Allow it to dry for a couple days after wetting. Be sure to check the forecast for rain!

Do not use in areas where you want to over-seed your lawn. Corn gluten will inhibit all seeds from germinating.

One application suppresses weeds for 4-6 weeks!


If you have any questions, give us a call! We are always happy to help. (970)484-5022

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