Must-have
Yellow leaves
Could be watering, nitrogen, iron, magnesium, pests, low light, old leaves, or root stress.
Symptom-first troubleshooting
For gardeners who know the symptom but not the cause. Start with what you see, then narrow it down.
Must-have
Brown tips
Often inconsistent watering, salts, low humidity, fluoride sensitivity, or potassium issues.
Must-have
Drooping
Can mean thirsty, overwatered, heat-stressed, cold-shocked, or root-damaged.
Must-have
Sticky leaves
Look for aphids, scale, mealybugs, whiteflies, and honeydew.
Should-have
Spots and patches
Compare pest stippling, fungal spots, sunburn, edema, and nutrient patterns.
Should-have
Curling leaves
Check water stress, aphids, mites, herbicide drift outdoors, heat, and humidity.