Diagnose and fix common lawn issues including brown spots, disease, fungus, and more.
Every lawn faces challenges, and the key to recovery is accurate diagnosis followed by the right treatment. Brown spots, yellow patches, bare areas, and mysterious die-off can stem from dozens of different causes -- fungal disease, insect damage, pet urine, soil compaction, or even mower damage. Treating the wrong problem wastes time and money while the real issue gets worse.
Fungal diseases like brown patch, dollar spot, and pythium blight are among the most common lawn problems, especially in humid climates or during periods of heavy rain. Learning to identify the telltale patterns each disease creates helps you respond quickly with the right fungicide before damage spreads. Our troubleshooting guides include photo references and step-by-step diagnostic flowcharts.
Insect pests like grubs, chinch bugs, and armyworms can destroy a lawn seemingly overnight. Understanding their life cycles and knowing when to check for them gives you the upper hand. We cover both preventive treatments and rescue applications, plus how to repair and restore areas that have been damaged. No lawn problem is permanent when you have the right knowledge.
Use the 150 Rule to time fungicide perfectly: daily high + nightly low = 150 means spray now. Plus the rotation schedule that prevents fungal resistance.
These lawn problems & solutions articles are most relevant to what your lawn needs right now.
Compare 4 grub killers by active ingredient (chlorantraniliprole, imidacloprid, trichlorfon), application window, and life-cycle stage. Includes the pyrethroids that won't work.
A side-by-side look at milky spore vs chemical grub killers — speed, cost, safety, and the Japanese-beetle catch most articles skip.
Grubs vs sod webworms — fast ID, damage patterns, and peak windows. Diagnose the pest in your lawn before you spend a dollar on treatment.
Kill lawn grubs without chemicals using beneficial nematodes (Heterorhabditis bacteriophora). Get timing, dosing, storage, and a step-by-step guide.
Browse all 22 articles in this topic. Filter by season to find exactly what you need.
Compare 4 grub killers by active ingredient (chlorantraniliprole, imidacloprid, trichlorfon), application window, and life-cycle stage. Includes the pyrethroids that won't work.
A side-by-side look at milky spore vs chemical grub killers — speed, cost, safety, and the Japanese-beetle catch most articles skip.
Grubs vs sod webworms — fast ID, damage patterns, and peak windows. Diagnose the pest in your lawn before you spend a dollar on treatment.
Kill lawn grubs without chemicals using beneficial nematodes (Heterorhabditis bacteriophora). Get timing, dosing, storage, and a step-by-step guide.
Discover the best flowers to plant with roses, including lavender, catmint, alliums, and salvia. Learn which companions fight aphids, black spot, and more.
Discover the best companion plants for marigolds, including tomatoes, roses, basil, and cucumbers. Learn which plants to avoid and how marigold roots repel nematodes.
Learn the proven 5-step method to fix dead grass patches. Expert tips on soil prep, seeding, and aftercare to restore your lawn permanently.
Fix poor lawn drainage with these proven DIY methods. Learn to identify problems and improve water flow to prevent soggy, damaged grass.
Fix bare spots in your lawn with our step-by-step guide. Learn when to seed, how to prepare soil, and get green grass growing in 2-3 weeks.
Learn the best timing for grub killer application. Early summer prevention and late summer treatment strategies for a healthy lawn.
Learn how to fix a bumpy, uneven lawn with simple tools and materials. Step-by-step guide using soil, sand, and basic equipment for smooth results.
Learn how to tackle moss, bare patches, and messy edges with these proven lawn care techniques. Transform your yard with simple, organic solutions.
Common questions about lawn problems & solutions, answered by our expert guides.
For preventers (chlorantraniliprole, imidacloprid), apply in late spring through early summer — before grub eggs hatch. For curatives (trichlorfon, gamma-cyhalothrin), apply when you confirm active grubs are feeding, usually late summer through early fall. See our when to apply grub killer hub article for zone-specific timing.
Read the full article →Preventers kill newly hatched grubs before they cause damage and have a long residual (weeks to months). Curatives kill active, feeding grubs quickly but have a short residual. Picking the wrong type is the most common reason a grub-killer application fails.
Read the full article →Fast-acting curatives like trichlorfon can kill feeding grubs within 24-72 hours after the product is watered into the soil, though visible turf recovery still takes 2-3 weeks as roots regrow. Preventers (chlorantraniliprole, imidacloprid) don't produce a visible result — they work over weeks to kill the next generation of grubs as they hatch.
Read the full article →All four products require pets and people to stay off the treated lawn until it is fully dry and granules are no longer visible. Chlorantraniliprole (GrubEx) has the lowest acute-toxicity profile in this group; trichlorfon has the highest. Always read the label's re-entry interval and follow it.
Read the full article →Yes — for all four products, watering in is required. The active ingredient stays locked inside the granule until water carries it into the root zone where grubs feed. Plan to apply at least 0.5 inch of irrigation immediately after application, or apply right before a forecast rainfall of similar volume.
Read the full article →Explore our complete library of lawn care articles covering every topic, season, and skill level.
