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

This is the place to come to ask a question or find an answer about what is that weed and how best to deal with it for your specific circumstances.

15 Dec RANGER HERBICIDE FOR HORSE PASTURES
Rachael 0 14783
Ranger, with thifensulfuron-methyl as the active ingredient, is a selective herbicide by Rainbow & Brown and is your go-to solution for controlling buttercups and docks in pastures, making it especially suitable for horse grazing. Ranger suppresses clovers without causing significant damage to grass species, ensuring your pasture remains productive..
13 Oct Which Glyphosate Do I Use?
Shayne 0 7754
Nothing much separates our three glyphosate products except strength: G-360 Glyphosate, G-540 Glyphosate and Granny Herbicide all give you the same weed control, just at different concentrations, application rates and prices per 100L. ✓G-360, G-540 and Granny all do the same job, just at different strengths ✓Granny works out cheapest per 100L..
02 Sep HOW TO KILL ONEHUNGA WEED
Shayne 0 9551
The Ultimate Guide to Controlling Onehunga Weed: When and How to Spray for Best Results If you've ever walked barefoot across a New Zealand lawn and suddenly jumped in pain, you've probably met Onehunga weed (Soliva sessilis). This notorious little pest has been the bane of bare feet across the country for decades, and if you're dealing with an in..
30 Apr Why is Rainbow & Brown Seaweed Extract Flake so good?
Shayne 0 4669
Understanding Ascophyllum nodosum Welcome to the world of Ascophyllum nodosum, affectionately known as rockweed, knotted wrack, knotted kelp or egg-wrack. Introduced to the Rainbow & Brown family in 2016, our Ascophyllum nodosum Seaweed Extract Flake is sourced from the icy waters of the Northern Hemisphere. This natural product has gained a loyal..
04 Feb Can K-Mate Humic Acid (Potassium Humate) improve Nitrogen efficiency?
Shayne 0 8294
Can K-Mate Humic Acid (Potassium Humate) improve Nitrogen efficiency? In the race to feed a growing global population, nitrogen (N) has become the superstar of plant nutrition. It’s the key to bumper crop yields and has led to a surge in urea fertilizer use, making up a whopping 70% of global agricultural nitrogen application. However, this surge ..
31 Jan Glyphosate, Halox 100EC and GA200 - Which One to Use Where?
Shayne 0 9334
Glyphosate, Halox 100EC and GA 200 – Which one to Use Where? We often get asked which of these three herbicides to use and where to use them.   Rainbow & Brown Glyphosate 360, Glyphosate 540 and Granny (high strength soluble granular Glyphosate) Glyphosate, a broad-spectrum herbicide, is one of the most widely used chemicals globally. It is kno..
24 Jan Spray Safe the Smarter Way
Shayne 0 4851
Spray Safe the Smarter Way   Spraying can be a hit-and-miss job at times. Having the certainty of knowing where chemicals have been applied, or the ability to detect spray drift by using a spray marker dye makes the process safer and more cost-effective too.   Rainbow & Brown sell FIL spray marker dyes which are high-quality additives that deli..
12 Sep Does Water Quality Affect Herbicides?
Shayne 0 11351
Does Water Quality Affect Herbicides? A simple question and a resounding yes.  For instance, most of you know that some herbicides, glyphosate being one of them, lose activity in the soil but that also applies to soil particles in the water.  So if you are dragging water from a pond, even if you are filtering you need to be careful that the filter..
27 Oct Rainbow & Brown Herbicide Spray Costs per Hectare
Shayne 0 24089
When selecting a herbicide there are many factors to consider.  What weeds will it kill?  Is it pasture friendly?  Does it harm clover?  Often you might end up with 2 or 3 options that all might do the job so how do you choose?  Well the one thing that often gets overlooked is the price.  Many might look at the 20L cost but this doesn’t really he..
26 May Grass and Pasture Friendly Herbicides
Shayne 0 13313
Which Rainbow & Brown Herbicides are Grass and Clover Friendly? Below is a handy reference table to show which of our products are safe to use on pasture and / or clover and which have some residual effect which might affect replanting. Note: in some circumstances and at certain times of the year or at the rates required to control some weeds the..
25 May Controlling Weeds in New Pasture
Shayne 0 9436
Controlling Weeds in New Pasture This one can be tricky as many of the herbicides used for general weed control in established pasture are just too tough on new pasture and you risk damaging your new pasture. Whether grass weeds or broadleaf weeds they can be either annual or perennial. It is really important that you are on top of perennial weed..
09 Feb When Can I plant Pine Seedlings after spraying Gorse?
Shayne 0 11416
We were recently asked the following question.I am looking to do a final gorse spray before I plant pine seedlings this winter. Which should I use, MSF or Grassmate to ensure that the pine seedlings are not affected? And how long should the gap be before the last use of MSF/Grassmate and planting pine seedlings? Our reply was:Both MSF600 and GrassM..
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26 Oct Farm Chemical Compliance NZ: What WorkSafe Is Finding in Farm Sheds
Casey 0 464
Every NZ farm that uses hazardous substances needs an up-to-date chemical inventory and a current safety data sheet (SDS) for each product, kept where workers and emergency services can get to them. When WorkSafe checked 680 sheep, beef and dairy farms in late 2025, missing SDSs and inventories were behind 94% of the improvement notices issued. B..
08 Oct How to Choose the Right Wetter for Herbicide Spraying NZ
Casey 0 2128
A wetter helps spray droplets spread across a leaf and stay there, instead of beading up and rolling off before the herbicide gets in. Use a non-ionic wetter for everyday spraying, and step up to an organosilicone wetter for waxy, hairy, dusty or stressed weeds. Always check the herbicide label first, because it tells you whether a wetter is need..
30 Sep How to Trap Wasp Queens in Spring NZ
Casey 0 3404
Spring is the only time of year a wasp queen is on her own. She's out of hibernation, building a small nest by herself and feeding her first larvae with no workers to back her up. Catch her now and that nest never forms, which means no colony of thousands and no new queens next autumn. ✓Queens are active from early spring, roughly September to..