Barricade Pre-Emergent Herbicide, manufactured by Nitro-phos, is a professional pre-emergent herbicide that controls a broad range of weeds and easily prevents unwanted foliage all season long.

This granule pre-emergent herbicide contains prodiamine, which stunts the growth of grassy and broadleaf weeds in established turfgrass, gardens, flowerbeds, and many other non-crop growing areas.

This easy-to-use granule product prevents root growth and seed germination of target weeds. When applied, it will leave a barrier in the soil that will stop weeds from sprouting for effective pre-emergent weed control. Barricade can be used in spring and fall to help you keep a weed-free lawn throughout the year.

Barricade is a pre-emergent herbicide formulated with small granule particles that readily break upon contact with water, providing superior performance and greater coverage of treatment areas.

The Barricade 10 lb. bag contains 0.58% prodiamine, while the Barricade 50 lb. bag contains 0.38% prodiamine.

Tools Needed

To use Barricade Granular Pre-Emergence Herbicide, you will need either a rotary, drop, or hand spreader designed for use with fertilizers and granulated herbicides. We recommend using a push broadcast spreader for best results and more extensive treatment areas. Hand spreaders work well for small or ornamental bed applications.

How to Use

• Step 1: Determine how much Barricade to use by measuring the square footage of the treatment area. You can do this by measuring the length and width of the treatment area in feet and then multiplying them together (length X width = square footage). For acreage, divide the square footage by one acre (square footage / 43,560 sq. ft. = acre). Depending on your turf species, you may use anywhere from 1.5 to 4 pounds of Barricade per 1,000 sq. ft. For landscape ornamentals, the application rate will be between 2.5 and 5.94 lbs. of product per 1,000 sq. feet. For example, if you have perennial ryegrass on a 3,000 sq. ft. lawn, and the labeled rate for your turf is 2 lbs. per 1,000 sq. ft., you will need to load 6 lbs. of Barricade into your spreader to cover your entire yard.
• Step 2: Now that you have determined how much you will need, calibrate your spreader to the right setting for application and load the appropriate amount of granules into it. This product label states spreader settings for various spreader types. If your spreader is not listed, you can set it to the low to mid-range for even distribution.
• Step 3: Broadcast the Barricade uniformly using your spreader type. You may need to conduct 2 perpendicular passes to get uniform coverage. If granules land on your driveway, sidewalk, or street, sweep the product back onto your lawn. Activate the granules by watering your lawn with at least 0.5 inches of water for best results.

Where to Use

Barricade Granular Pre-Emergent Herbicide can be used on established residential and commercial lawns, ornamental turf, landscape ornamentals, perennials, and wildflower plantings.

Do not apply to golf course putting greens or areas where dichondra, colonial bentgrass, velvet bentgrass, or annual bluegrass (Poa Annua) are desirable species. Not for use on plants being grown for sale or other commercial use, commercial seed production, or research purposes.

When to Use

Timing is critical when applying pre-emergent products. If the weeds are already established, the product will not work. Spring and fall are the best times to apply pre-emergent herbicides. 

Apply only to actively growing turf. Do not apply if heavy rain is expected.

This product will inhibit the germination of turf seed if overseeded too soon after application. Do not apply to overseeded turf within 60 days after seeding or until after the second mowing, whichever is longer.

Safety Information

Barricade Pre-Emergence Herbicide is safe to use around pets and children when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when handling and applying this product.

Keep children and pets off the treated area until the product has dried. Do not graze or feed livestock forage cut from treated areas.

Do not apply near water, storm drains, or drainage ditches.

Special Considerations

Barricade Pre-Emergence Herbicide will not kill established weeds. For that, you will need to use a post-emergent herbicide. Applying Barricade may thin emerged annual bluegrass and newly overseeded grasses, so wait at least 60 days after seeding to apply the product. Avoid cultural practices such as core aeration, disturbing the herbicide barrier, and reducing weed control.

Some listed plant cultivars may be sensitive to this product when under stress (such as heat, drought, or frost damage).