Sudden Container Plant Collapse: Soil Moisture Extremes and Diagnostic Protocol

Tomatoes Curling, Pansies Melting — Same Day, Moist Soil. The Diagnosis.

Moist soil + sudden collapse = waterlogging (drowning) OR extreme dryness masked by wet surface. Here's the forensic check.

Immediate Forensic Protocol

1. Remove plants from pots. Examine FULL root ball.
2. Is bottom soggy? → Drainage failure / overwatering
3. Is bottom bone dry? → Water channeling / hydrophobic soil
4. Is soil uniformly moist? → Check for pests/disease
5. Saucer under pot? → Empty it. Plants NEVER sit in drainage water.

Watering Rules (Universal)

• Water THOROUGHLY until draining freely
• Let drain 10 minutes
• WAIT until significantly lighter / top 2" dry
• Better dry than wet (recovery easier)
• Full sun + air circulation = disease prevention

Other Culprits

• Fungus gnats (larvae eat roots) — yellow sticky traps
• Root rot fungi — smell soil (sour = rot)
• Fertilizer burn — recent feeding?

Start with the pot dump. The soil tells the truth. Fix drainage/watering first. Then investigate pests.