Yellowing or rust-like marks can begin along the outer leaf margins, often on older leaves first.
Symptoms may appear first
Older growth, especially leaf edges and margins.
Use this visual as a reference point, then assess the full grow environment before drawing conclusions.
Pattern progression
Watch how the cue develops.
Margin changes may move inward or become more defined across affected older leaves.
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.
