Quick answer: Brown spots on Neon pothos are not a diagnosis. Dry tan marks after a move into strong sunshine can be scorch; dark spreading lesions with wet soil call for root and disease checks; brittle leaf tips can result from drought or excess salts. Look for the pattern and recent changes before applying treatments.
Read the pattern of the damage
Dry bleached patches on sun-facing leaves suggest sudden strong light. Dark soft tissue plus a heavy waterlogged pot suggests roots may not be functioning. Crispy edges and a very light pot call for a moisture check. Sticky leaves, webbing, or small attached bumps require insect inspection. A single spot does not establish a bacterial or fungal infection.
Check potting mix and roots first
Use a finger or probe below the surface to check moisture, then confirm that water can exit the pot. Persistent saturation deprives roots of oxygen. If a declining plant remains wet, gently inspect its root system and remove only tissue that is unmistakably rotten. Do not leave a healthy root ball bare overnight, bake the pot in direct sun, or add more fertilizer as an automatic treatment.
Sun injury versus leaf infection
When spots appear after moving the plant closer to a strong sunny window, shift it to filtered light and allow gradual acclimation. When new lesions expand over several leaves without a lighting change, isolate the plant and avoid leaving water standing on foliage. UF/IFAS notes that pothos greenhouse disease can resemble ordinary cultural injuries, so professional identification is preferable to an unverified fungicide treatment.
Look for pests and prevent repeated damage
Inspect the leaf undersides and joints of stems for scale, mealybugs or mites. Use gentle physical removal or only an indoor-labeled pesticide suited to confirmed insects, following product instructions. Photograph marks and date them to track whether damage is spreading. Leave mostly green leaves in place; they still produce energy. Old brown tissue will not turn green, but healthy new foliage signals improvement.
A quick response checklist
Check recent sunlight changes, then evaluate moisture and drainage, examine leaves under bright light, identify any active pests and isolate only when necessary. Change one supported factor at a time. Avoid spraying fungicide, adding fertilizer and repotting simultaneously without evidence for each intervention.
Frequently asked questions
Should I cut off every spotted leaf?
No. Keep leaves with ample healthy green tissue unless a diagnosis calls for removal.
Does every dark lesion mean root rot?
No. Inspect the actual roots and potting mix before deciding.