You may also want to consider adding in some water absorbing crystals or perlite to the potting mix as well to retain additional moisture. In times of excessive heat and windy conditions, especially with hanging baskets, this additional moisture is necessary to keep plants from drying out. Although coconut fiber liners hold and absorb water well, they are still porous and apt to dry out more quickly. Therefore, you should always check plants frequently to stay on top of their watering needs.