Most plant problems come from watering, light, or pests, not disease. Yellow leaves and wet soil usually mean overwatering, brown crispy tips mean underwatering or dry air, and holes or sticky leaves point to pests. For a fast answer, snap a photo with PlantIn’s plant disease identifier to see what’s wrong with your plant and how to fix it.
What Are the Most Common Plant Problems?
The most common plant problems fall into four groups: watering mistakes, light and temperature stress, pests, and diseases. Most of them come from care conditions, not infection, so start by checking how you water and where the plant sits.
- Watering problems: Overwatering causes yellow, soft leaves, wet soil, and root rot, while underwatering causes drooping, dry, crispy leaves. See how to tell overwatering from underwatering.
- Light and temperature stress: Too little light makes plants pale and leggy; harsh sun scorches leaves brown; cold drafts and frost turn leaves dark and mushy.
- Pests: Aphids, mealybugs, scale, spider mites, and thrips cause holes, sticky leaves, webbing, or speckled foliage.
- Diseases: Fungal and bacterial diseases show up as powdery white coating, dark leaf spots, rot at the base, or sudden wilting.
The sooner you notice a change in your plant’s leaves, stems, or growth, the easier the problem is to fix.
How to Diagnose Plant Problems
To diagnose plant problems, identify the plant, check the soil, and inspect the leaves, stems, and roots for clues. Follow these steps:
- Identify your plant. Each species has different needs, so a symptom that’s normal for one plant can be a warning sign for another. If you’re not sure what you have, identify your plant from a photo.
- Check the soil. Push a finger 1–2 inches into the soil. Wet, sour-smelling soil points to overwatering; dry soil pulling away from the pot points to underwatering.
- Inspect the leaves, top and bottom. Look for yellowing, brown edges, spots, holes, white powder, or sticky residue. Many pests hide on leaf undersides.
- Look for the culprit. Search for insects, eggs, webbing, or droppings. If you find a bug you don’t recognize, identify it with our pest identifier.
- Check stems and roots. Soft, dark stems or brown, mushy roots usually mean rot. Healthy roots are firm and white or light tan.
- Think about recent changes. A new spot, repotting, a change of season, or new fertilizer can all trigger sudden symptoms.
Still not sure what’s wrong with your plant? Browse the list of common plant diseases and pests below, or send a photo to Ask the Botanist and get a treatment plan from a PlantIn expert.
