Spraying for weeds is not just about applying herbicides and hoping for the best. Like most things in nature, timing plays a vital role. Understanding when to spray for weeds and following a smart weed control calendar can save your lawn and reduce chemical waste. From spring’s first growth to fall’s last gasp, let’s break down the best weed treatment by season—along with the tools that can help.
“Look deep into nature, and then you will understand everything better.”
— Albert Einstein
Spring: Strike Early with Pre-Emergents
Spring marks the start of growth for many plants—and unfortunately, weeds too. This is when you should focus on applying pre-emergent herbicides to prevent annual weeds like crabgrass and foxtail before they sprout. Pre-emergents are most effective when soil temperatures consistently reach 55°F for a few days.
A key strategy during this season is targeting early germination. Applying too late means the seeds have already sprouted, rendering the treatment useless. Track soil temperatures using online tools or lawn thermometers to time your application precisely.
Summer: Spot Treating for Control
By summer, weeds that escaped spring treatment will become visible. This is when post-emergent herbicides are your best friend. Summer treatments are best applied in the early morning or late afternoon when temperatures are below 85°F. Be cautious—spraying in extreme heat may damage your lawn and reduce herbicide effectiveness.
Weed control in summer often means targeting broadleaf weeds and perennial invaders like dandelions. Consistent mowing and watering also help crowd out weed growth by strengthening turfgrass.
Fall: Prevent the Comeback
Fall is ideal for addressing perennial weeds that are storing energy in their roots. Apply systemic post-emergent herbicides during this time, which will travel deep into the plant system and prevent regrowth in the spring. This is also an excellent time to fertilize your lawn and seed any bare patches, improving your lawn’s resilience.
Pairing this treatment with regular yard maintenance ensures your lawn enters winter in strong shape, with fewer opportunities for weed seeds to establish themselves.
Tomahawk Tool Tip
For covering large yards efficiently, consider the Tomahawk Pro Series 6.6 Gallon Gas Power Backpack Sprayer with Twin Tip Nozzle. It’s built for high-efficiency applications, making it easier to maintain a seasonal treatment schedule across acres of land.
