10 Best Fertilizer For Cannabis 2025 in the United States

The FoxFarm Fertilizer Soil Trio is a set of three liquid nutrients designed to promote healthy growth in cannabis and other plants. The trio includes Grow Big for vegetative growth, Tiger Bloom for flowering phases, and Big Bloom for overall plant health. These fertilizers are specifically formulated to work together, which can simplify the feeding process for growers.

One of the strengths of this product is its organic certification, making it suitable for those who prefer organic gardening methods. The nutrients are tailored to provide essential macro and micronutrients, ensuring that your plants receive balanced nourishment. The included Twin Canaries Conversion Chart is a helpful resource for users to understand optimal application rates, which can ease the learning curve for new growers.

On the downside, these liquid fertilizers require careful measuring and mixing, which may be daunting for beginners unfamiliar with fertilizer application. Additionally, while the organic nature of Big Bloom is a plus, it may not provide as rapid results as some synthetic options. The packaging, although compact at 1 pint per bottle, might also run out relatively quickly for larger operations, leading to more frequent purchases.

The FoxFarm Fertilizer Soil Trio is an excellent choice for cannabis growers looking for an organic solution that promotes robust growth and flowering. However, it may require more effort in application and consistent purchasing for those with extensive growing needs. This product suits both novice and experienced gardeners who appreciate quality nutrients in manageable quantities.

FoxFarm Big Bloom Plant Food is a liquid fertilizer designed for flowers, fruits, vegetables, and potted plants. This fertilizer is particularly notable for its organic composition, utilizing earthworm castings and bat guano to provide a rich array of nutrients. It has a very low NPK ratio of 0.01-0.03-0.7, which is beneficial for encouraging blooms without overwhelming the plants with high nitrogen levels. This can be especially suitable for cannabis cultivation, as it promotes robust flowering and root development, and enhances flavor and fragrance in herbs and fruits.

Additionally, the product is easy to apply by mixing with water, making it convenient for both indoor and outdoor use. The versatility allows it to be used regularly for a variety of plants, not just cannabis, which is great for gardeners who grow multiple types of plants. However, the low NPK ratio might not be ideal if you are looking for a strong growth boost, especially in the vegetative stage of cannabis.

The product's organic nature ensures no harmful chemicals are introduced, but it may require more frequent applications compared to synthetic fertilizers. In terms of micronutrients, the inclusion of high-test ingredients provides a well-rounded nutrient profile. FoxFarm Big Bloom Plant Food is a solid choice for those focusing on flowering stages and organic gardening practices.

FoxFarm Tiger Bloom Liquid Fertilizer is designed for cannabis growers looking for a fast-acting formula to enhance flower and bud development. With an NPK ratio of 2-8-4, it offers a high phosphorus content which is crucial for the flowering stage of cannabis growth. This can lead to more vigorous flower production, making it a good choice for those aiming to maximize their yield during this phase.

The inclusion of micronutrients helps ensure that plants get a well-rounded diet, which can promote overall plant health and productivity. The fertilizer is synthetic, which means it can provide nutrients more quickly than organic options, potentially giving your plants a rapid boost. However, this also means it's not suited for those strictly adhering to organic growing practices.

The low pH formulation helps maintain nutrient stability and availability, which can be particularly beneficial in hydroponic systems where nutrient balance is crucial. The liquid form and easy mix ratio (1 part fertilizer to 200-300 parts water) make it straightforward to apply, whether you're a novice or an experienced grower. If you're focused on enhancing flowering and bud development with a fast-acting, easy-to-use fertilizer and don't mind synthetic options, FoxFarm Tiger Bloom could be a strong contender for your cannabis growing needs.