How much water per tablespoon

The only answer I could find in the booklet was 1 teaspoon per quart of water so thats what I used. If anyone knows differently please advise. The instructions were very unclear.

Can you use this in rock beds and if so, will it kill the shrubs and plants around the rocks you spray? Thx

My experience has been that it only prevents germination. If a weed already exists, it won't kill it. I didn't use it in my flower beds, but I assume the same is true for existing plants. Don't use in areas you are planning to seed.

can I use it in a vegetable garden?

Barricade 4l is NOT approved for use in vegetable gardens. It can be used in wildflower gardens and with some ornamental flowering bulbs. Look up ‘Barricade 4L herbicide label’ on the web and you should find the EPA label, which describes application rates, the approved crops or plantings, and susceptible weeds. I suggest you consider “Preen” which is a granular pre-emergent herbicide that is approved for use on many vegetable crops. I use the red label form on my gardens. You can also look up the label for “Preen” on-line.

Where could I find the instructions for application and mix rate?

I left an answer on a separate question on this product page that I went into detail. The label calls for NO MORE THAN .5oz to 1.1oz of product per 1000square feet PER YEAR. find the square footage of the area to be treated, then find out how many gallons of solution it will take to cover that area (a test application with no products added can be helpful) and how many applications per year you want to do. I do .25oz product per 1000sqft per treatments and I treat 3 times per year. This ends up being .75oz per year, which gives me good results and doesn't stress the grass too much, and also leaves a little wiggle room for areas that accidentally get over applied.

Desertcart Logo

Deliver to Ireland

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🌿 Lock out weeds before they start—because your lawn deserves the VIP treatment!

FLEXIBLE USAGE RATES - Customize your control with adjustable rates for short or long growing seasons—precision meets power.
BROAD SPECTRUM DEFENSE - Targets 30+ turf weeds including crabgrass, chickweed, and spurge—total coverage.
ONE DONE APPLICATION - Apply once and enjoy a weed-free lawn all season long—effortless control.
PRE EMERGENT POWERHOUSE - Stops weeds before they even think of sprouting—timing is everything!
WEATHER RESISTANT FORMULA - Stays locked in the germination zone even after heavy rain or snow—no washout worries.

Syngenta Barricade 4FL is a premium pre-emergent herbicide designed for professional-grade weed prevention in lawns, turf, and ornamentals. Its temperature-sensitive application window ensures optimal timing, while its low solubility formula guarantees long-lasting control through varying weather conditions. One application protects against over 30 common turf weeds all season, making it the go-to solution for managers seeking a pristine, weed-free landscape with minimal effort.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.