• Landscape Lighting Design: Bright Ideas
    With outdoor spaces more popular than ever, lighting these landscapes may be your next opportunity. Click here to learn more.

Pre-emergent breakdown


LawnSite Bronze Member
Georgia Z7
Something I read today suggested that pre-emergent herbicides breakdown in the soil by microbial activity.

My previous understanding was that moisture was the main trigger for breakdown. So if one applies pre-emergent when the soil temperature is 40 degrees or less, will there be any breakdown?

Knowing this could have a big impact on how I approach the January-February applications next year.