Coco peat soil mix trial on my gutter set is not giving good result, it could be the type of plant that I tried.
Spearmint, on left with coco peat and right with hydroton. Both of these are in the same gutter growbed system.
Bawang Dayak, this in front compare to the one at the back which is in hydroton. The one in hydroton grow better.
These coco peat mix could be waterlogged in the flood & drain system. I will need to use pebbles next to provide alternative to hydroton.