10 Best Fertilizer For Marijuanas 2025 in the United States

Organic Plant Magic's Truly Organic Fast-Acting Water Soluble Plant Food is a powder fertilizer designed to support a wide range of plants, including marijuana. It is an organic fertilizer that avoids synthetic chemicals and relies on natural ingredients like amino acids, humic acids, kelp, and beneficial microbes to nourish plants. This product contains over 55 trace minerals and beneficial biology such as mycorrhizae, which can help improve soil health and plant nutrient uptake.

The CANNA Growing Nutrients Set is a liquid fertilizer kit designed to support various growth stages of marijuana plants, including root development, vegetative growth, and flowering. It combines several products like Canna Coco A + B, Rhizotonic, Cannazym, Boost, and PK 13/14, which together provide a balanced supply of essential nutrients. The inclusion of PK 13/14 indicates strong support for the flowering phase, which is crucial for producing large buds. This set is synthetic-based, offering precise nutrient control and easy absorption, but it may not appeal to those seeking fully organic options. The liquid form allows for flexible and straightforward mixing, though beginners might find mixing ratios challenging.

The FoxFarm Fertilizer Soil Trio is a solid choice for those looking to enhance their marijuana plants. This trio includes Grow Big, Big Bloom, and Tiger Bloom, which are designed to work together to support healthy growth, flowering, and fruit production. The N-P-K ratios in these fertilizers cater to different growth stages, with Tiger Bloom focusing on phosphorus to boost flowering, while Grow Big supports vegetative growth. This balanced approach allows growers to provide targeted nutrition throughout the plants' life cycles.