One of the leading causes of death in indoor plants is improper nutrition. A plant can't live off soil that it is has been sitting in for an extended period of time - it has already leached all the nutrients it can from its pot. That's why it's so important to pick a good fertilizer to use on your indoor plants in order to keep them as happy and healthy as possible. Holland Park carries a variety of plant-specific specially formulated plant fertilizers for plants such as orchids, cacti and succulents, and tropicals. These fertilizers come in both liquid and slow-release granulated formulas.