Plant Problems & Pests

Diagnosis-first help for symptoms, root trouble, and common houseplant pests

16 written guides

Guides in this topic

• Mealybugs on Houseplants: Identification and IPM Treatment

  Confirm mealybugs, isolate the plant, reduce the population mechanically, and use label-compliant treatment only when monitoring shows it is necessary.

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• Root Rot Triage for Houseplants

  Learn how to distinguish suspicious wilting from confirmed root damage, inspect a houseplant safely, salvage healthy tissue, and prevent another waterlogged pot.

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• Scale Insects on Houseplants: Identification and IPM Control

  Distinguish soft from armored scale, verify which covers are alive, monitor for crawlers, and use mechanical or label-compliant controls according to the evidence.

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• Thrips on Houseplants: Identification, Monitoring, and IPM

  Distinguish active thrips from old damage, use traps as monitors rather than cures, and build an adaptive IPM response around the pest, plant, and pesticide label.

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• The Houseplant Moisture Meter Reality Check

  A moisture meter can add one useful clue, but its number is not a watering command. Learn how to test the tool, compare readings, and confirm the root zone.

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• Houseplant Nutrient Deficiency or Lookalike? A Diagnosis-First Guide

  Use symptom location, care history, roots, water, and testing to separate a possible houseplant nutrient problem from common lookalikes before changing fertilizer.

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• Houseplant Water Quality: How to Check Tap Water and Salt Buildup

  Most tap water works for most houseplants. Learn when source water deserves a closer look, how to read the evidence, and how to manage salt buildup safely.

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• How to Identify and Control Fungus Gnats in Houseplants

  Confirm fungus gnats, interrupt their moist-soil life cycle, and use targeted controls safely with this step-by-step indoor plant plan.

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• Pothos Leaves Turning Yellow: A Diagnosis-First Guide

  Yellow pothos leaves are a symptom, not a diagnosis. Use the pattern, root-zone condition, light, and pest evidence to choose the safest corrective action.

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• Spider Mites on Houseplants: Diagnosis and IPM Control

  Confirm live spider mites before treating, then use isolation, monitoring, water removal, plant care, and a label-compliant miticide only when needed.

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• Why a Peace Lily Droops: A Diagnostic Guide

  Distinguish dry-soil wilt from saturated roots, light stress, cold injury, pests, and transplant shock before treating a drooping peace lily.

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• Why Monstera Leaves Do Not Split: A Diagnostic Guide

  Diagnose solid Monstera leaves by checking plant identity, growth stage, light, support, roots, and care rather than trying to force fenestration.

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• Brown Houseplant Tips and the Clues Behind Them

  Brown tips can come from dry air, water or root trouble, salts, water chemistry, heat, or injury. Read the full pattern before changing care.

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• Mold on Potting Soil: Diagnosis and Safe Cleanup

  Distinguish possible fungal growth from mineral crust and houseplant pests, correct the moisture problem, and recognize when a plant or health concern needs expert help.

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• How to Inspect Houseplants for Pests: An Early-Detection Checklist

  Inspect leaves, stems, potting mix, and nearby surfaces for live pests and fresh damage, then choose the right diagnosis guide before taking action.

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• Winter Houseplant Watering: How to Adjust Without a Fixed Schedule

  Use light, temperature, potting mix, and root-zone moisture to decide whether a houseplant needs water during winter.

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