2 weeks ago i bought few schefflera arboricola plants for my living wall in 12cm soil pots.
The plants are intended for aquaponics system and 4 days ago i replanted half of them on my living wall (in pockets with rocks, removed from original pot watering and draining is every 2.5 hours for 5 min).
All schefflera (in soil and in rocks) have same symptoms of black spots / rots on leaves, and its dropping easily.
What might be the problem? is it fungus type or over-watering?