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This Blog section is for news about Rainbow & Brown products and their application but especially new products.

General information about farming, weed control, herbicides, seaweed, fertlisers and other.

04 Nov How to Kill Agapanthus
Shayne 0 46463
Agapanthus is not really a weed, of course. It’s more of an ornamental flower, and a pretty nice one too, in its place. It is, for example, better able than almost anything else to handle the carbon monoxide laden atmosphere in the middle of a busy motorway. That’s why we see so many planted there, and looking very pretty too. The problem, however,..
14 Oct HOW TO KILL CARROT WEED
Shayne 0 13077
Parsley dropwort (Oenanthe pimpinelloides) is very often known as ‘carrot weed’ although it is not closely related to the wild carrot species. It is common in Northland and South Auckland, but also exists in other North Island locations.  It grows in pastures as well as waste areas, roadsides, disturbed ground, sports fields and lawns. Carrot wee..
11 Sep The Perfect Storm - Glyphosate Price Rises
Shayne 0 6936
Glyphosate Continues to RiseShort supply of raw material and increased production and shipping costs create almost the “perfect storm”!Increased global demand coupled with China’s Yunnan district have cut power supply by 10-30% resulting in shortages and huge increases in the price of yellow phosphorous which is the main raw material used for glyph..
25 Jun NATURAL OR GREEN HERBICIDES - the hidden facts
Shayne 0 9989
NATURAL or GREEN HERBICIDES - THE HIDDEN FACTS This article arose from a question from a customer that wanted to spray out a whole paddock – grass and weeds - but wanted a natural herbicide solution as they had a horse that was sensitive to chemicals. Fair enough. We have always been keen on offering some more “green” herbicide alternatives..
14 Jun How Toxic are Herbicides
Shayne 0 8306
How toxic are herbicides?Although herbicides are chemicals and all chemicals should be treated with respect there needs to be some perspective given  as there is a mountain of misinformation being spread by people that really don’t know what they are talking about.  I hear it all the time on talkback and it makes my blood boil.Below is a table whic..
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15 Jun How to Keep Horse Paddocks Healthy in NZ: Weeds, Flies, and Nutrition
Casey 0 315
Healthy horse paddocks in NZ need a three-pronged seasonal approach: weed control for persistent species like docks and buttercups, residual fly and tick management through summer, and trace mineral support to fill gaps that good pasture alone can miss. ✓Docks and buttercups reduce pasture quality and can irritate horses; treat in early spring..
28 May Foliar Fertilisation in NZ: When It Works, When It Doesn't, and How to Get It Right
Casey 0 418
Foliar fertilisation means spraying dissolved nutrients directly onto plant leaves, where they're absorbed through the leaf surface and bypass the soil entirely. It's most useful for correcting mid-season deficiencies quickly, delivering micronutrients that soil chemistry is locking up, and supporting plants at critical growth stages when you can..
10 Mar What to Use Instead of Banvine
Shayne 0 12863
Note: This article was last updated March 2026 What Can We Use Instead of Banvine(1)? Quick answer: Banvine(1) contained 200g/L 2,4-D and 100g/L dicamba. The closest ready-mixed alternative from Rainbow & Brown is LawnMate. A lower-cost option is to use individual herbicides such as WHACK – 2,4-D 800 and Rainbow & Brown Dicamba 500 SL, but any ..