Which Herbicide for Which Weed?
Match the herbicide to the weed, not the other way round: systemic glyphosate suits deep-rooted perennials, while contact glufosinate gives fast knockdown of young annual weeds and hard-to-kill grasses.
Why picking by weed type saves money
Most failed spray jobs are not caused by a bad product. They happen because the product was the wrong type for the weed, or the weed was too big. Ten minutes of identification before you buy can save a second round of spraying.
The quick chooser
| Your weed problem | What it is | Better fit |
|---|---|---|
| Bindweed, couch grass, thistle | Deep-rooted perennials | Systemic glyphosate, so the product travels to the roots |
| Young annual weeds, seedlings | Shallow roots, fast growth | Contact glufosinate for quick burn-down |
| Cowgrass and resistant grasses | Hard-to-control grass weeds | Glufosinate, often used to rotate away from glyphosate |
| Large areas of mixed vegetation | Mixed annuals and perennials | High-concentrate glyphosate for land maintenance |
| Woody stumps and brambles | Woody perennials | Cut-and-treat methods; check labels carefully |
Always confirm that the product label allows your use, crop and country before buying. Rates, safe intervals and restrictions differ.
Three questions to ask before you spray
- Is it growing? Systemic products work best on actively growing leaves.
- How big is it? Small weeds are far easier to control than flowering, mature ones.
- What is next to it? Non-selective products harm crops and garden plants they touch.
Rotate to slow resistance
Using the same chemistry every season can select resistant weeds. Alternating between glyphosate and glufosinate across seasons, combined with crop rotation and scouting, helps keep both effective.
Pro tip: Take a clear phone photo of the weed next to a coin or ruler. It makes identification, and any advice you ask for, far more accurate.
Watch out: Wear gloves, eye protection and suitable clothing, and read the Safety Data Sheet before every application. Never spray in strong wind.
Frequently Asked Questions
Is glyphosate or glufosinate better for perennials?
Glyphosate is systemic and usually preferred for deep-rooted perennial weeds, as it moves down to the roots.
Which one works faster?
Glufosinate is a contact product and typically shows visible browning in days, while glyphosate can take one to two weeks.
Can I mix glyphosate and glufosinate?
Do not mix products unless the label explicitly allows it. Rotating between them across seasons is a safer approach.
Ready to choose? See the full range of HerbiSolutions herbicides, or compare the glyphosate 15% and glufosinate options directly.