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.

Houseplants

Aloe Vera Brown Spots

Brown spots on Aloe Vera come from opposite causes that print the same color, so the mark on its own is not enough to act on…

Diagnosis + recovery

Houseplants

Aloe Vera Drooping

A drooping Aloe Vera has either lost the water pressure that holds its leaves up, or grown leaves that were never able to hold…

Diagnosis + recovery

Houseplants

Aloe Vera Yellow Leaves

A yellow Aloe Vera leaf means the green has been taken out of it, and there are only three ways that happens. Which leaves changed…

Diagnosis + recovery

Fruits

Apple Tree Fungal Leaf Spots

Several unrelated fungi mark apple leaves, and they do not share a treatment. Two of the six causes on this page are not spray…

Diagnosis + recovery

Fruits

Apple Tree Poor Fruit Set

An Apple Tree that flowered has already proved it is alive, old enough to bloom, and healthy enough to spend the energy. What went…

Diagnosis + recovery

Shrubs

Arborvitae Bagworms

Bagworms strip arborvitae foliage that never grows back, which makes this a calendar problem rather than a spray problem. This page…

Diagnosis + recovery