Black Streaks on Pepper Joints: Rich Soil Adjustment

Likely Harmless Pigmentation

Streaky black at branch joints on strong, flowering plants = anthocyanin accumulation from rich soil (manure + peat + humus). Not disease.

Simple Test

• Reduce morning watering (keep evening only).
• Watch 3–4 days.
• If no negative change, continue.

Soil Richness

Your mix is very fertile. Peppers prefer leaner soil. Next year: less manure, more sand/perlite.