Stop Crabgrass and Weeds Before They Sprout

Applying a pre-emergent herbicide in spring is one of the most effective strategies for preventing aggressive summer weeds such as crabgrass, foxtail, and spurge. Pre-emergent products work by forming a protective barrier in the upper layer of soil that prevents weed seeds from successfully germinating, stopping the problem before it ever becomes visible. Timing is critical: crabgrass seeds begin to germinate when soil temperatures reach about 55°F for several consecutive days, so the treatment must be applied before that threshold is reached. When used properly, pre-emergents can reduce the number of summer weeds dramatically and help maintain a thicker, healthier turf throughout the growing season.

In the Sacramento region, this timing window typically falls between late February and early March, slightly earlier than many northern climates because of the region’s mild winters and early spring warming. As temperatures rise and soil moisture increases, dormant weed seeds become active and begin competing with lawn grasses for sunlight, nutrients, and water. Because many summer annual weeds can produce thousands of seeds and spread rapidly once established, preventing germination in spring is far more effective than trying to control mature weeds later in the season. Establishing this early-season barrier greatly reduces the need for repeated herbicide applications during Sacramento’s hot, dry summer months.

For homeowners and property managers in spring 2026, the role of pre-emergents is especially valuable as warmer-than-average late-winter conditions can accelerate weed germination. Applying a properly calibrated treatment and lightly watering it into the soil activates the protective layer that blocks weed seeds while leaving established turf unaffected. Combined with proper mowing height, irrigation management, and seasonal fertilization, pre-emergent applications are a foundational part of professional lawn care programs in Northern California. The result is a denser, more resilient lawn that resists summer weed invasions and maintains a cleaner appearance through the peak growing season.

We offer pre-emergents treatments with our Lawn Fertilization and Weed Control Programs and Seasonal Services.