Big Bloom® Liquid Plant Food is a carefully selected blend of fertilizers formulated to support multiple blooms and seed formations. This liquid plant food supplies nutrients that your plants can access immediately with bat guano and earthworm castings. Bat guano has been used for centuries as a fertilizer for all kinds of plants. When combined with earthworm castings they create a nutrient-rich mix that can help your plants thrive. OMRI Listed® and CDFA Registered. Garden tip: Big Bloom® is formulated for all fruiting and flowering plants, and it can be used during all stages of plant growth.