Weed control on hard surfaces made easy by Progreen

Guidance on effective weed control for hard surfaces, covering suitable herbicides, surface types, residual options and safe, responsible application.

Controlling weeds on hard surfaces presents a unique set of challenges that are not typically encountered when treating soil substrates. Unlike landscaped areas, hard surfaces are not designed to support vegetation, yet weeds can still establish themselves in cracks, joints, and porous materials. Achieving effective and long-lasting weed control therefore requires careful product selection and correct application techniques.

Understanding Hard Surfaces in the Amenity Sector

In the amenity sector, hard surfaces are defined as any man-made surface not intended to bear vegetation. These include:

Concrete
Tarmac
Paving
Railway ballast
Gravel surfaces

Because this category covers such a wide range of materials, it is important to recognise that no single weed control product will perform effectively across all surface types. Products suitable for railway ballast or gravel, for example, may be entirely unsuitable for use on tarmac or paved areas.

The Role of Herbicides in Hard Surface Weed Control

The judicious use of herbicides remains one of the most effective methods for long-lasting weed control on hard surfaces. However, care must always be taken to:

Select the most appropriate product for the surface being treated
Apply products strictly in accordance with the manufacturer’s instructions
The withdrawal of effective weed control chemicals such as dichlobenil and sodium chlorate has further complicated product selection, making correct choice and application even more important.

Controlling Annual and Perennial Weeds

For common weed problems, including annuals and perennials, a glyphosate-based contact weed killer provides an effective, though temporary, solution.

Popular amenity-approved options include:

When applied while weeds are actively growing, these products deliver reliable control, although repeat treatments may be required as they do not provide residual activity.

Long-Lasting Control with Residual Herbicides

A welcome addition to the market is the long-lasting residual herbicide flazasulfuron, which is the active ingredient in products such as Chikara.

When flazasulfuron is tank-mixed with glyphosate, it can provide weed control for up to five months. However, it is important to note that this solution is only suitable for porous surfaces and must not be used on impermeable materials such as tarmac or concrete.

Removing Dirt, Slime, and Moss from Hard Surfaces

Dirt and slime buildup on hard surfaces can be effectively treated using DDAC-based products, such as Mac Hi-Power or AlgoClear Pro. In addition to surface cleaning, DDAC also has the beneficial side effect of treating moss & Algae, helping to improve both appearance and safety.

Frequently Asked Questions

How can spray drift and run-off be minimised?

Spray drift and run-off can be reduced by accurately targeting the weeds being treated, using the correct application equipment, and avoiding spraying in windy or wet conditions.

Why should I read the product label and safety data sheet?

Product labels and safety data sheets provide essential information on correct usage, application rates, safety precautions, and legal restrictions. Reading them before use helps prevent misuse and potential harm.

What protective clothing should be worn when applying herbicides?

Appropriate protective clothing may include gloves, coveralls, eye protection, and suitable footwear. The exact requirements will be detailed on the product label and should always be followed to protect both the operator and others nearby.