Older foliage may show unusually dark blue-green tones, with violet or purpling cues appearing alongside the pattern.
Symptoms may appear first
Older growth and lower leaves.
Use this visual as a reference point, then assess the full grow environment before drawing conclusions.
Pattern progression
Watch how the cue develops.
Color shifts can become more pronounced on established foliage as the pattern progresses.
Check before acting
Look beyond the leaf.
Check pH, EC, watering, root-zone conditions, light or heat stress, and pests before acting. Visible symptom patterns can overlap, so this guide helps you investigate rather than confirm a diagnosis.
Need a second look?
Add a photo to your grow record.
Scan a plant photo for AI-guided visual observations and keep the result alongside your grow history. A scan provides guidance, not a guaranteed diagnosis.
