For which plants are they most useful?
Coconut Husk Fertilizer is especially useful for money plant, snake plant, aloe vera, rose, tomato, chilli and other garden plants. Mixing it in potted plants keeps the soil light and airy, due to which the roots get enough oxygen and the plants grow faster.
Also read- Waste To Best DIY Planter: Stop throwing away broken cups, bottles and cans! Make a stylish planter