Spring Weed Control

A Pre-Emergence Guide

Written by
Joshua Gifford
Published on
March 29, 2023 at 9:43:13 AM PDT March 29, 2023 at 9:43:13 AM PDTth, March 29, 2023 at 9:43:13 AM PDT

It’s that time of year again! Soil temperatures are warming up and many homeowners, business owners, and facilities managers are starting to plan for cost-efficient ways to keep their property looking great. When it comes to weed control, pre-emergent herbicides are a key tool to prevent weeds from even germinating in the first place. However, the guidelines for pre-emergent application can differ between lawns with cool season and warm season grasses.

Cool season grasses, such as Kentucky bluegrass and perennial ryegrass, typically require pre-emergent applications in the fall and early spring, as this is when most weed seeds germinate. For warm season grasses, such as Bermuda grass and zoysia grass, pre-emergent application should be timed for early spring before soil temperatures reach 55-60 degrees Fahrenheit.

Pre-emergent herbicides can also be used on non-lawn sites such as agricultural land, natural areas, and other types of landscapes. However, it's important to note that the guidelines for pre-emergent application may differ depending on the type of site and the weeds you are targeting. For example, in agricultural settings, pre-emergent herbicides may need to be applied before planting crops or in between crop cycles to prevent weed growth. In natural areas, pre-emergent herbicides can be used to control invasive plant species and protect native plant communities. As with lawn applications, it's important to choose the right type of pre-emergent herbicide for your specific site and follow the manufacturer's instructions carefully to ensure safe and effective application.

Regardless of the type of grass in your lawn, it's important to choose the right type of pre-emergent herbicide. While dry granular pre-emergent herbicides are often found in traditional "weed and feed" products, liquid or water-soluble pre-emergent herbicides are more effective.

This is because liquid pre-emergent herbicides can be absorbed by weed seeds more easily than granules. Liquid herbicides are also more uniform in coverage and can be applied with greater precision than dry granules. This helps to ensure that all areas of your lawn receive adequate coverage, maximizing the effectiveness of the herbicide.

When applying liquid pre-emergent herbicides , it's important to follow the manufacturer's instructions carefully. This includes the recommended application rate, timing, and method of application. Some liquid herbicides may need to be diluted with water before application, while others can be applied directly.

In addition to following the guidelines for pre-emergent application, it's also important to maintain a healthy lawn. A well-fed and properly watered lawn is better equipped to compete with weeds and resist their invasion.

Overall, pre-emergent herbicides are an effective tool for preventing weeds from taking over your lawn. By choosing the right type of herbicide and following the recommended guidelines for application, you can enjoy a lush, healthy lawn all season long.

Popular Pre-Emergent Solutions

Cavalcade 4L

Experience top-notch residual weed control with Cavalcade® 4L Pre-Emergent Herbicide. This liquid formulation is your solution for long-lasting control of 30 grassy and broadleaf weeds.

Prodiamine 4SC

Prodiamine 4SC is a pre-emergent herbicide that provides residual control of many types of annual grass and broadleaf weeds by preventing the growth of newly germinated weeds.

Mojave 70 EG

Mojave 70 EG is a powerful herbicide that provides complete control of bareground vegetation by both burning down existing vegetation and preventing regrowth.