2026 Guide to treat common lawn weeds in Australian lawns. Bindii, Clover, Oxalis, Nut grass, Guildford / Onion Grass, Winter Grass, Mullumbimby Couch.
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Australian lawns face pressure from a wide range of weeds, whether you’re dealing with bindii, clover, onion weed, wintergrass or creeping oxalis, the key to effective control is choosing the right herbicide for the right weed.
This guide breaks down the most common lawn weeds in Australia and the best‑matched products to control them safely and effectively in your lawn.
Common weeds and how to treat them in lawns ⬇️
🌼 1. Bindii (Jo‑Jo /Onehunga Weed)
Why it’s a problem: Bindii produces painful prickles in summer, making lawns unusable for kids and pets.
Best treatment:
Bow & Arrow is one of the most effective selective broadleaf herbicides for bindii. It targets the weed without harming couch, kikuyu, buffalo, zoysia and more.
🍀 2. Clover (WhiteClover)
Why it’s a problem: Clover spreads rapidly in lawns and competes aggressively with turf.
Best treatment:
Excellent clover control thanks to its three‑way active combination. Safe to use on couch, kikuyu, buffalo, zoysia and more.
A strong broadleaf option for clover infestations. Works well in couch and kikuyu. Avoid on buffalo.
🌱 3. Creeping Oxalis
Why it’s a problem: This weed spreads via stolons and tiny bulbs, making it persistent and difficult to remove manually.
Best treatment:
Provides reliable control, ideally mix with a surfactant such as Wetter600 for optimal control. Safe to use on couch, kikuyu, buffalo, zoysia and more.
Works great in couch and kikuyu ideally mixed with a surfactant such as Wetter600. Safe on couch and kikuyu. Not safe to use on buffalo.
🧅 4. Onion Weed / Guildford Grass (Onion Grass)
Why it’s a problem: A bulb‑based weed that resists mowing and hand‑pulling.
Best treatment:
✔️ Odessa Herbicide + Wetter600
A sulfonylurea herbicide designed to translocate into the bulb, making it one of the most effective solutions for onion weed and guildford grass. Safe on couch (NOT QLD Blue), kikuyu, buffalo and more.
🌾 5. Wintergrass (Poa annua)
Why it’s a problem: A cool‑season grassy weed that produces masses of seed heads and thins out lawns.
Best treatment:
✔️ Spartan Pre‑Emergent Herbicide
One of Australia’s leading pre‑emergents for preventing wintergrass germination. Ideal for couch, kikuyu and buffalo.
A powerful post‑emergent option for controlling existing wintergrass in warm‑season turf. Safe on couch and buffalo. Not safe on kikuyu.
🧅 6. Nut grass
Why it’s a problem: It competes with turf for nutrients, grows faster than normal grass, and survives by producing a network of underground tubers (nuts) that sprout back even after the plant is pulled or mowed.
Best treatment:
It works by inhibiting an enzyme called acetolactate synthase (ALS), which is crucial for the plant’s growth. Safe to use on couch, kikuyu, buffalo + more.
🧅 7. Mullumbimby Couch
Why it’s a problem: It is an aggressive, fast-spreading weed that thrives in moist, shaded conditions, forming dense mats that choke out turf.
Best treatment:
It works by inhibiting an enzyme called acetolactate synthase (ALS), which is crucial for the plant’s growth. Safe to use on couch, kikuyu, buffalo + more.
🌿 8. Capeweed
Why it’s a problem: Large rosettes smother turf and spread aggressively in winter.
Best treatment:
Highly effective on capeweed in home lawns and safe to use on couch, kikuyu, buffalo, zoysia and more.
Very effective option but not to be used on buffalo lawns.
🌸 9. Dandelion & Other Broadleaf Weeds
Why they’re a problem: Compete with lawns for nutrients and sun light.
Best treatment:
The go‑to broadleaf herbicide for most Australian lawns which is safe on just about all lawn varieties including couch, kikuyu, buffalo, zoysia and more.
A great option if you have couch or kikuyu but not safe to use on buffalo.
If you have any questions or need any advice don't hesitate to get in touch!
Mighty Goat Lawns 🐐