How to identify common plant diseases and care problems

Plant disease identifier apps are most useful when you give them a clear symptom and enough context. Fungal disease, insect damage, overwatering, underwatering, sun scorch, nutrient problems, and physical damage can produce overlapping signs. A careful inspection helps you separate them.

Start with the pattern

Look at where the problem began and how it spreads. Lower leaves yellowing one at a time can suggest a different cause from pale new growth. Dry brown edges differ from soft dark patches. Circular spots, powdery coatings, fine webbing, sticky residue, holes, and tiny moving insects are especially useful clues.

Photograph more than one view

• Capture the whole plant to show distribution.
• Take a sharp close-up of the damaged area.
• Photograph the underside of affected leaves.
• Include the soil surface, stem base, or visible roots when relevant.

Check the environment

Ask what changed before the symptoms appeared. Was the plant moved, repotted, fertilized, left in standing water, exposed to cold, or placed in stronger sun? Feel the soil below the surface and confirm that excess water can leave the pot. Inspect neighboring plants because pests can spread.

Use a diagnosis as a working hypothesis

Photo analysis can narrow down likely explanations, but it cannot measure soil moisture deep in the pot or know the full care history. Change one major variable at a time when the plant is stable enough, document what you did, and watch new growth.

How Hanami helps

Use Hanami's health check with a clear symptom photo. Review issue clues and the suggested next steps, then save an observation to the plant's timeline. Notes and repeat photos make it easier to see whether the plant is stabilizing or continuing to decline. For valuable plants, severe infestations, or rapid collapse, contact a local nursery, extension service, or plant pathologist.