Post-emergent herbicides are sprayed to kill weeds that are already growing and visible above the soil. It is absorbed through the weed's leaves and moves through the plant, disrupting growth and causing the weed to die from the inside out. This process can take up to 14 days to see results. Pre-emergent herbicides which prevent weed seeds from germinating before they grow are restricted in Canada.

Weed control treatments only affect weeds that are visible and growing at the time of application. Seeds already in the soil can germinate later when conditions are right, which is why ongoing treatments are needed to keep weeds under control.

Yes. Using liquid aeration together with mechanical core aeration provides the best results. My Yard Ninja recommends this combination to deliver a thicker, greener lawn with longer-lasting soil improvement. Mechanical core aeration removes small plugs of soil, immediately relieving heavy compaction and allowing air, water, and nutrients to reach the roots. Liquid aeration then flows into those holes and surrounding soil, breaking down compaction at a microscopic level and continuing to work long after the plugs have broken down. Together, these two services provide both immediate and long-term benefits, including deeper root growth, improved water absorption, better nutrient uptake, reduced soil compaction, and a healthier, more resilient lawn overall.

Even if your lawn is weed-free now, weeds can return from seeds hidden in the soil. Ongoing weed control and fertilization from My Yard Ninja keeps weeds from coming back while strengthening your grass to naturally crowd them out. Consistent care protects your investment and keeps your lawn healthy, green, and looking great year after year.