Brown Patches Return in Exact Same Spots After Resodding

Pitt Meadows, BC. 120 sq ft yard. Dog urine spots killed old grass. Resodded June 13 with vitamin pellets, water nightly 20 min. Brown patches reappeared in same spots by July 6. Fungus? Spectracide Immunox?

Too Early for Old Problem to Recur

New sod is still rooting (3 weeks). Same-spot recurrence suggests:

• Shallow topsoil over compacted/hard layer: Roots hit barrier, dry out.
• Dog urine residue: Salts persist in soil; new sod roots into toxic zone.
• Night watering: Wet blades all night = fungus incubator.

Immediate Fixes

1. Switch to early morning watering (finish by 8 AM).
2. Check rooting: tug test. Don't mow until rooted.
3. Apply Spectracide Immunox (myclobutanil) per label—reapply 7 days if allowed.
4. Dead patches won't recover—resod or seed after fungus suppressed.

Long-Term

Train dog to one gravel/mulch area. Build 6+ inches of quality topsoil over entire yard.

Same spots = same soil issue. Fix the root zone, not just the grass.