Grazon Pro Paddock Weed Killer 1L

Grazon Pro is a systemic penetrant selective contact herbicide containing 240 g/l triclopyr and 60 g/l clopyralid. It can be used to control a wide range of broad-leaved weeds in amenity grassland and grassland. Grazon Pro can be used to spot treat problem weeds at a rate of 60 ml product to 10 l water.

SKU: 17244
Sale price£56.65 ex. VAT
£67.98 inc. VAT
(minimum of 1)


Grazon Pro Selective Herbicide 1L

Product Overview
Product Type Herbicide
Product Name Grazon Pro
MAPP No. 19875
Active Substances Clopyralid and triclopyr
Formulation Emulsifiable concentrate
Areas of Use Amenity grassland & grassland
Amateur/Professional Professional
Phytomobility Phloem mobile systemic
Mode of Action Group Synthetic auxins

Grazon Pro is a highly effective selective fertiliser that can be used to treat a wide range of broad-leaved weeds. It provides excellent control of weeds with tap roots such as docks and spear thistle as well as other problem weeds including nettles, brambles, broom and gorse in amenity grassland and grassland situations.

Grazon Pro is authorised for application via handheld sprayers, enabling excellent targeting of problem weeds. It is ideal for use on permanent pasture as well as other grass surfaces that are cut infrequently such as golf roughs.

Product Benefits

  • Can be applied via a handheld sprayer
  • Controls a wide spectrum of weeds
  • Low application rate offers excellent value
  • Rainfast in just 2 hours

Instructions for use

Where to use

Grazon Pro can be used in all amenity grassland and grassland situations.

  • Amenity grassland: Areas of semi-natural or planted grassland subject to minimal or non-intensive management
  • Grassland: Land grown for grass production which may be grazed and/or cut for animal consumption

When to use

Grazon Pro can be used between 1st March to 30th October and is most effective when used to treat weeds that are actively growing.

Application Window
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

For optimum efficacy, the timing of the application of Grazon Pro is crucial:

Weed Type Application Timing
Nettle When actively growing but before flowering
Dock In the spring when docks are in the rosette stage
Creeping thistle When actively growing but before flower spikes are 15 cm high
Bramble, broom and gorse June-August when actively growing but before autumn senescence begins

How to use

Grazon Pro can be applied using handheld spraying equipment such as a knapsack sprayer using a medium spray quality nozzle:

  • Half fill the spray tank with water
  • Add the required amount of Grazon Pro and agitate to ensure thorough mixing
  • Add the remaining water and continue to agitate
  • Maintain agitation of the spray solution whilst spraying
  • When spraying ensure foliage is thoroughly wetted but run-off should be avoided
  • To allow maximum translocation, avoid cutting the grass for up to 28 days after application
  • After spraying clean all spraying equipment inside and out, using a suitable spray tank cleaner

Additional Information

  • Do not apply onto or around manure or other compost heaps
  • Do not roll or harrow grass for 10 days before or 7 days after application
  • Any yellowing of the sward is transient and will quickly grow out
  • Avoid contact with non-target plants, ponds, lakes or water courses
  • In hot conditions vapour drift may occur
  • Grazon Pro residues in plant tissues (including manure and compost) which have not completely decayed may affect succeeding susceptible crops
  • Do not use plant material treated with Grazon Pro or manure from animals fed on crops treated with Grazon Pro for composting or mulching
  • Be aware that conifers are particularly sensitive to spray drift
  • Avoid applying when conditions are not suitable for active plant growth
  • Exclude livestock during treatment and for at least 7 days following treatment, if ragwort is present exclude livestock until it has completely recovered or died and there is no visible sign of the dead weed

Active Substances

Clopyralid and triclopyr

Bio-Chemical Mode of Action: Clopyralid and triclopyr belong to the synthetic auxins group of herbicides.

Synthetic auxins work by inducing rapid abnormal cell growth and development in the stems, petioles and leaves of susceptible plants causing cell bursts and ultimately cell and plant death.

Mobility: Clopyralid and triclopyr are systemic penetrants which means that the active substance can be translocated downwards through the plant within the phloem (sugar conducting tissues) and upwards through the plant within the xylem (water conducting tissues).

Application timing: Systemic auxins are best applied when the weeds are actively growing. They are generally more effective when target plants are younger and in their vegetative phases.

Resistance: The incidences of resistance to synthetic auxins remains relatively low which is assumed to be because the herbicide has multiple sites of action.

However, resistance to synthetic auxins has been observed globally with 36 species being confirmed as resistant as of 2017. Best management practices, such as alternating with products with a different mode of action and using cultural weed control methods, will help to reduce the risk of further resistance.

If you require further information regarding Grazon Pro Selective Herbicide, contact our technical sales team on 01902 440280. 

For Spot Treatment of Weeds in Established Grassland

Technical Information

Delivery and Returns

Delivery charge (if applicable) applied at checkout. Next working day delivery is available on some products, as an option on orders placed before 1pm - excludes festive season & bank holidays. Please note deliveries to Highlands, Cornwall and more remote areas may take longer. Surcharges apply for non mainland locations, call for more information - More delivery information.

For large orders, please be aware that if you require a smaller 7.5 tonne lorry, the maximum weight for pallets is 750 kg - otherwise the standard pallet size limit of 1000 kg applies.

If you have any access restrictions for lorries or large vehicles please speak to our sales team on +44 (0)1902 440250.

Collection from our Telford, Shropshire, Trade Counter is available for this product - More collections information.

Safe use of pesticides

The purchaser and/or end users are responsible for ensuring that these products are used in line with industry Approved Codes of Practice. All operators must be trained and certificated in using and applying any Ministry Approved professional product.

Please be aware that by proceeding you are purchasing a professional pesticide product.

You must ensure the end user of these products complies with the DEFRA/HSE Code for the Safe use of Pesticides:

"By law, everyone who uses pesticides professionally must have received adequate training in using pesticides safely and be skilled in the job they are carrying out."

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