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Weed Control Chemicals NZ

Effective Weed Control Chemicals and Soil Boosters, distributed across New Zealand

Rainbow & Brown supplies a range of selective herbicides and weed control products as well as bulk blood and bone fertiliser and liquid lawn fertiliser.  We select only the highest quality products with proven results.  Products can be shipped throughout New Zealand

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From our Blog

20 Sep How to Kill Carrot Weed (Parsley Dropwort) in NZ Pasture
Shayne 0 13386
Carrot weed is the common name for parsley dropwort (Oenanthe pimpinelloides), a perennial broadleaf weed that regrows each year from small black tubers on its roots. Stock won't eat it, so it takes over paddocks quietly and then flowers from October through April once it's too late to do much about it. The window that actually works is autumn th..
13 Sep What Is Biochar and How Does It Work in NZ Soil?
Casey 0 65
Biochar is a highly porous form of charcoal made by heating wood with very little oxygen, and it works by giving soil (and gut) microbes somewhere to live while holding onto water and nutrients that would otherwise wash straight through. Southland Carbon makes it from New Zealand wood biomass at Pukerau, and the same process that produces the bioc..
17 Aug How to Control Buttercup in Pasture NZ (Without Losing Your Clover)
Shayne 0 237
Buttercup survives in pasture because cattle find it genuinely unpalatable, so it's left standing while everything around it gets grazed down. Flumetsulam-based herbicides such as Decision control both annual and giant (perennial) buttercup while leaving clover largely untouched, unlike older broadleaf sprays that knock clover around too. Spring, ..