Plant Diagnosis

Plant Problems

Start with the symptom you can see. Compare likely causes before changing water, fertilizer, light, or treatment.

Triage First

Observe before you treat

A useful diagnosis starts with location, timing, and the pattern of damage.

1

Locate the damage

Check whether symptoms begin on old leaves, new growth, roots, or one side of the plant.

2

Check recent changes

Note weather, watering, repotting, feeding, pruning, and any new treatment.

3

Compare evidence

Look for insects, residue, soft tissue, dry edges, odor, and soil moisture.

Problem Library

Search by visible symptom

85 matching guides

Search and filter problems

Search checks problem names, descriptions, and summaries. Plant group uses the category saved on each problem; sorting uses the update date or problem name.

Fruits

Pomegranate Fruit Cracking

A pomegranate usually splits when its juicy arils expand faster than the rind can stretch, with rain or heavy irrigation after dry…

Diagnosis + recovery

Fruits

Pomegranate Poor Fruit Set

Start with the base of a newly opened Pomegranate flower. A narrow vase-shaped bloom is functionally male and normally falls after…

Diagnosis + recovery

Houseplants

Pothos Yellow Leaves

When Pothos leaves turn yellow, locate the changing leaves before reaching for the watering can. One oldest leaf fading evenly can be…

Diagnosis + recovery

Perennials

Powdery Mildew on Black-Eyed Susan

Powdery mildew on Black-Eyed Susan forms expanding white-gray colonies on living leaves, stems, or buds. Confirm the surface pattern…

Diagnosis + recovery

Vegetables

Powdery Mildew on Cucumber

Powdery mildew on Cucumber forms expanding white colonies on older leaves, then shortens the useful life of the canopy. Confirm the…

Diagnosis + recovery

Vegetables

Powdery Mildew on Zucchini

A zucchini plant with a few powdery mildew colonies can keep flowering and producing if most of its canopy remains green. Confirm the…

Diagnosis + recovery