Bottle Garden Plants – How To ...
Oct 22, 2020 · Creating Gardens in a Bottle. Bottle garden plants require porous soil. This both reduces rot and allows air to get to the roots. You can improve your soil's drainage by adding one inch of pea gravel to the bottom of the bottle and adding a small layer of horticultural charcoal on top. The charcoal reduces any sour smells created from decomposition.