Optimize Plus Organic Fertilizer is specially designed to nourish your indoor plants. Apply topically once a month to all your potted plants, no need to change your soil! Fully organic, it's enriched with concentrated humus, calcium and iron to improve the porosity and structure of your soil. It also encourages microbial soil life, as well as boosting moisture retention and nutrient uptake. The ingredients are people and pet friendly, so it's completely safe to have around the house!