New Sod Staying Too Wet: Drainage Issue, Not Overwatering

Northern California homeowner installed 50/50 blue/rye sod 12 weeks ago. Tapered watering from 1″ daily to 1″ every 4 days. Now (60s temps): soil feels wet, grass mats down, raccoons dig, one corner pools water.

Diagnosis: Not overwatering—poor drainage. Water isn't moving through the profile. Causes: compaction, clay layer, hardpan, poor grading, or sod laid on unamended subsoil.

Consequences: Wet surface = fungal disease (brown patch, Pythium), shallow roots, matting, eventual dieback.

Action needed:

• Probe soil: dig a few holes. Is there a distinct layer change? Standing water in hole?
• Check sprinkler uniformity (catch cans)
• Consult a local pro for on-site drainage assessment
• Possible fixes: aeration + compost topdressing, French drain, regrading, soil amendment

Don't cut water blindly—grass needs moisture. Fix the *exit route* for water, not the input.