I'm looking for some advice because we're not too happy with the weed killer we've been using. Our lawn and garden are about 200m². So far, we've tried:
Kiwicare 2L Lawnpro Turfclean And Green Rapid+ Hose Pack
https://www.bunnings.co.nz/kiwicare-2l-lawnpro-turfclean-and…
Yates Weed n Feed Lawn Weed Killer and Fertiliser 4 litre
https://www.mitre10.co.nz/shop/yates-weed-n-feed-lawn-weed-k…
We're now considering the Kiwicare Turfclean Ultra Concentrate 800ml, which was recommended by someone at Mitre10:
https://www.mitre10.co.nz/shop/kiwicare-turfclean-ultra-conc…
I've also come across glyphosate in my research:
https://www.sprayshop.co.nz/products/ken-up-glyphosate-360-5…
Here are my questions:
What's a good product that gives decent results without costing too much?
Should I be using the same product for both the lawn and garden, or different ones?
Should I spray the entire area, or just focus on problem spots (precision strike)?
What condition is your lawn in? If it's bad then you may need to resow the lawn (or at least areas that are patchy). The hard part is matching the grass type to what you already have as there are many different blends which will look quite different to your current lawn if you get the wrong one.
The weedkillers you have listed above kill diffferent types of weeds.
Turfclean will kill broadleaf weeds, leaving fine grass intact. If you have weeds that don't have a broad leaf then this won't kill them.
Gyphosate on the other hand is broad spectrum and will kill or at least knock back whatever it comes into contact with. This will kill your grass too. In fact it is best used as a weedkiller for grass type weeds. Many broadleaf weeds will not die with glyphosate.
Unfortunately there isn't a one size fits all approach.