10 Best Pre Emergents For Zoysia Grasses 2026 in the United States

Preen Garden Weed Preventer is a granular pre-emergent designed to stop weeds before they start, with effectiveness lasting up to three months. It covers a relatively large area of 3,520 square feet per 22-pound bag, which is convenient for medium-sized gardens. The product is versatile in terms of timing, as it can be applied in spring, summer, or fall, giving you flexibility for your weed control routine.

This product is specifically not for use on lawns, including zoysia grass, which means it won't be suitable if you're looking to protect or maintain a zoysia lawn. It’s safe to use around many established plants such as flowers, vegetables, trees, and shrubs, making it a good choice for garden beds where you want to prevent weeds without harming other plants. Since it only prevents new weeds from sprouting and does not kill existing weeds, you’ll still need to remove any current weeds before applying.

The granule form is easy to spread, and it can refill a flip-top applicator for easier application. While Preen is convenient and well-regarded by users, its unsuitability for lawns is a significant drawback if your goal is to protect zoysia grass specifically. For those targeting garden beds, it provides a reliable, easy-to-use option with good coverage and residual control.

Scotts Turf Builder Weed & Feed3 is a combination weed killer and lawn fertilizer suitable for various types of grass, including Zoysiagrass. It contains active ingredients 2,4-D and Mecoprop, which are effective in controlling over 50 types of listed weeds such as dandelions and clover. The product is in granule form and should be applied to a wet lawn when weeds are actively growing, with temperatures between 60°F and 90°F. This ensures the product is most effective in killing existing weeds and promoting a thicker lawn.

A single 14.29 lb. bag covers an area of 5,000 sq. ft., making it suitable for medium-sized lawns. One of the major strengths of this product is its dual action of feeding the lawn while also controlling weeds, which helps maintain a healthy and lush appearance.

However, it seems to lack specific pre-emergent action, meaning it may not prevent new weeds from sprouting. Additionally, the product is not available in Florida, which could be a limitation for users in that region. The need for specific application conditions (wet lawn and particular temperatures) might also be a constraint for some users. Despite these drawbacks, Scotts Turf Builder Weed & Feed3 is a solid choice for those looking to improve their lawn’s health and appearance by tackling existing weeds and fertilizing grass simultaneously.

The Andersons Barricade Professional-Grade Granular Pre-Emergent is a solid choice for preventing weed growth in zoysia grass lawns, covering a large area of up to 12,880 square feet per 40-pound bag. It contains 0.48% prodiamine, a trusted active ingredient effective for early spring and fall applications, matching the typical timing needed for pre-emergent control. The granule form with patented DG Technology ensures quick dissolution with watering, allowing the product to penetrate the soil efficiently and begin working soon after application.

This helps stop common grassy and broadleaf weeds like crabgrass and poa annua before they sprout. Its fine granule size promotes more even distribution, which is important for consistent weed prevention. It is important to note that this product does not kill existing weeds and must be applied before weed seeds germinate to be effective. While it offers good coverage and residual control, following the correct timing is essential to maximize results.

Customers rate this product positively, indicating reliable performance in typical lawn care settings. This pre-emergent is best suited for homeowners or lawn care enthusiasts seeking a professional-level, easy-to-use product to protect their zoysia grass from weeds throughout the growing season.