Patch at seed-friendly temps (spring/fall for these grasses). All-in-one "patch repair" products work too — they're seed + mulch + starter at a convenience markup.
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The repair math
patch area = spots × spot size · seed at ~1.5× the new-lawn rate (small areas dry fast and get bird tax — seed heavy)
Spot repair is miniature lawn renovation: same seed-to-soil, same keep-it-moist rules, at dinner-plate scale. The 1.5× rate is deliberate — patches fail from drying out and bird raids more than anything, and seed is the cheap part of the errand.
The routine that prevents the next dozen
In effectiveness order: a designated potty corner (mulch or pea gravel, treats for compliance — two weeks of training beats years of patching), the watering-can chaser on the favorite spots, and urine-tolerant grass where the dog roams. The products aimed at the dog's water bowl are where this budget goes to die.
Patch day, step by step
Rake the dead spot to bare soil (dead grass won't let seed through), rough the surface, flush it once (clears residual salts), thin compost layer, seed heavy, press it in, and mist daily for two weeks. Doing many spots plus a thin lawn? Jump to the full overseeding planner and do the whole yard in one pass — and if the spots keep coming back in a ring pattern, double-check it's actually the dog with the brown lawn diagnostic(fungus fools people).
Frequently asked questions
Why does dog pee kill grass?
Nitrogen overdose — urine is concentrated fertilizer, and a dose that would feed 50 sq ft lands on one dinner plate of turf. That's also the giveaway ring: the dead center got burned, the diluted edge got fed, so it grows extra green. Female dogs and big dogs make worse spots purely by delivery volume, not chemistry.
How do I fix dog urine spots on my lawn?
Fresh spot (still green): hose it hard within a few hours — dilution below burn strength, no damage. Dead spot: rake out the dead grass, rough the soil, a thin layer of compost, patch seed, keep moist two weeks. This calculator sizes the seed and compost for your spot count.
Do dog rocks / supplements / tomato juice work?
The honest answer: nothing you feed the dog reliably fixes the lawn, and some pH-changing supplements risk the dog for the grass's benefit (vets universally frown). What works is boring: a watering can chaser, a trained potty corner with mulch or gravel, and urine-tolerant grass. Save the supplement money for seed.
What grass survives dog urine best?
Tall fescue is the champion (deep roots, bounces back), perennial rye close behind — both also happen to be quick germinators for patching. Kentucky bluegrass and most warm-season grasses spot worst. If you're overseeding a dog yard anyway, that's the pick.