COCONUT HUSK CHIPS
After years of experience with many trial and errors, I finally came the most successful candidate - where it works best for me. Of course, different gardeners will propose and use based on their experience and their garden condition - in my context. I find the best that works for me are coco-chips. Do not get me wrong, it is not the same with using cocopeat or fiber. I strong discourage gardeners to use purely cocopeat as these retain too much water for long-term duration causing root and stem rot.
However, coconut chips alone will not work as it would be too dry and sparse - hence it need to be mixed with other material.
Here I use, in rough estimation of 50-75% coconut chips mixed with sand and compost.