Weed, Pest & Disease Control
Quick Answer
Everything in this category works or fails on timing rather than on brand. A pre-emergent applied two weeks late is money spent on nothing, and a post-emergent applied at the wrong point in the plant's cycle kills the top and leaves the root. Read the active ingredient and the application window before comparing anything else.
It is also worth saying plainly: several of these products are the second-best answer. Dense turf outcompetes most weeds, and extension services generally treat correct mowing, feeding and watering as the primary control with chemicals as a supplement.
Which Type Do You Need?
- Stopping annual weeds before they appear → pre-emergents
- Weeds already visible, broad leaves → post-emergent broadleaf
- Crabgrass already up → crabgrass killers — a narrow window
- Turf lifts like carpet → grub control
- Shaded, damp, thin turf taken over by moss → moss killers — and fix the shade
Our Top Picks
Reviews in progress
The Types, Briefly
Pre-Emergents
Stop seeds establishing. Timing is the entire product.
Broadleaf Herbicides
Selective control of dandelion, clover, plantain and similar.
Crabgrass Killers
Post-emergent control, effective only on young plants.
Grub Control
Preventative and curative products work on completely different calendars.
Insect Control
Chinch bugs, armyworms, sod webworms — identification first.
Fungicides
Rarely recommended for home lawns. Read the guide before buying.
Moss Killers
Kills the moss, does not address why it colonised.
How to Choose a Lawn Treatment
Buy the active ingredient, not the brand. The front of the bottle is marketing; the active ingredient panel tells you what the product actually does, and the same active appears under many names at very different prices. Then check two things on the label: what it is safe to use on, and when. Selective herbicides are selective only for the grasses listed — several will damage St. Augustine or centipede at rates that are fine on fescue. And every product in this category has a window: pre-emergents must be down before germination, curative grub products only work against young larvae, and fungicides cannot cure an infection that has already established.
| Specification | Why it matters |
|---|---|
| Active ingredient | The only reliable basis for comparison. Identical actives appear across brands and price tiers. |
| Labelled grasses | Selective products are selective for named species. Applying one to a grass not on the label can kill the lawn. |
| Application window | Most failures in this category are timing failures, not product failures. |
| Rainfast period | How long the product needs before rain, which decides whether a forecast rules out today. |
| Re-seeding interval | Many herbicides prevent grass seed establishing for weeks afterwards. This conflicts directly with autumn seeding. |
| Coverage per container | Stated at a specific rate. Concentrates and ready-to-use products are not comparable by volume. |
Swipe the table sideways to see every column.
What to ignore
- — 'Kills over 200 weeds' claims — the list is dominated by species that are not in lawns
- — Speed-of-visible-results claims, which often indicate a contact product that does not reach the root
- — 'Organic' framing that does not change how the product behaves — several natural actives are non-selective contact killers
Common mistakes
- — Applying a pre-emergent and then seeding, or seeding and then applying a pre-emergent — the two jobs compete for the same weeks
- — Treating grubs preventatively in autumn when the product is designed for young larvae earlier in the season
- — Buying a fungicide for a brown patch that turns out to be drought, a dull blade or dog urine
- — Using a product not labelled for your grass species and losing the lawn along with the weeds