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Kerb Flo 5L is a residual herbicide containing 400 g/L propyzamide for long-lasting control of grasses and broad-leaved weeds in amenity areas, hard surfaces, and around trees. Ideal for winter use, it remains effective in cold, damp conditions.
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Kerb Flo 5L is a powerful, residual herbicide used for the control of annual and perennial grasses and a wide range of broad-leaved weeds in amenity grassland, ornamental plantings, industrial sites, hard surfaces, and around trees and shrubs. It contains the active ingredient propyzamide, which works by inhibiting root growth, offering long-lasting, soil-acting weed control through the winter season and beyond.
Ideal for use in late autumn and winter, Kerb Flo is rainfast and works effectively in cold and damp conditions, making it the go-to solution for out-of-season weed control where glyphosate and contact herbicides fail to perform. Kerb Flo is trusted by local authorities, highways contractors, grounds maintenance teams, and estate managers for clearing and maintaining weed-free areas with minimal re-growth.
Features & Benefits
Long-lasting residual control of grass and broad-leaved weeds
Works in cold, damp winter conditions when other herbicides are ineffective
Safe for use around trees, shrubs, and ornamentals
Excellent option for winter weed management in amenity and industrial areas
Controls difficult species including blackgrass, annual meadow grass, and cleavers
Application Rates
Boom Sprayer:
Apply 1.7 L to 4.5 L per hectare, depending on target species and soil type.
Knapsack Sprayer:
Use 25–50 ml in 10L of water, depending on application area and weed pressure.
Always refer to the product label for specific crop/weed combinations and safe use near sensitive plantings.
Type of Weed Control
Residual, systemic pre- and early post-emergent herbicide
Weeds Targeted
Annual meadow grass
Blackgrass
Ryegrass
Poa annua
Chickweed
Speedwell
Cleavers
Groundsel
Mayweed
Other annual grasses and broad-leaved weeds
Active Ingredient
Propyzamide – 400 g/L
Areas of Use
Amenity grassland and managed turf
Industrial and non-crop areas
Hard surfaces (railway ballast, pathways, paved areas)
Around trees and ornamentals (including hedge bases)
Parks, roadside verges, and shrub beds
Coverage
One 5L pack covers up to 2.9 hectares at 1.7 L/ha
or approximately 1.1 hectares at the high rate of 4.5 L/ha.
MAPP Number
MAPP 13716
Period of Use
October to February
Best applied in cool, moist conditions when soils are damp but not waterlogged
Avoid if heavy rainfall or flooding is expected
Professional Use Notice
Kerb Flo 5L is a professional use-only herbicide, and as such, requires that all users hold appropriate PA1 and PA2/PA6 certificates under UK pesticide law. Applications must follow best practices outlined in the Code of Practice for Plant Protection Products to ensure safe handling, environmental protection, and compliance with usage guidelines.
Application Rate (Boom) | 1.7–4.5 L/ha in 200–400 L water
Application Rate (Knapsack) | 25–50 ml per 10L water per 400–500 m²
Type of Control | Residual systemic herbicide
Weeds Targeted | Blackgrass, annual meadow grass, cleavers, chickweed, speedwell
Active Ingredient | Propyzamide (400 g/L)
MAPP Number | 13716
Areas of Use | Amenity turf, hard surfaces, tree bases, industrial and non-crop land
Coverage | Up to 2.9 ha per 5L at 1.7 L/ha
Period of Use | October to February
