10 Best Organic Garden Fertilizers 2026 in the United States

Fox Farm Big Bloom Liquid Plant Food is an organic liquid fertilizer designed mainly for flowering and fruiting plants, with an N-P-K ratio of 0-0.5-0.7. This means it focuses on providing phosphorus and potassium, which are key for blooms and fruit development, while offering almost no nitrogen. The nutrients come from natural sources like earthworm castings and bat guano, making it a good choice for gardeners who prefer organic options.

General Hydroponics CaliMagic is a liquid fertilizer designed primarily to supply calcium and magnesium, essential nutrients that many fast-growing plants need to avoid problems like blossom end rot or tip burn. Its N-P-K ratio is 1-0-0, meaning it provides a small amount of nitrogen but no phosphorus or potassium, so it's not a complete fertilizer but a targeted supplement. This makes it especially useful for calcium-loving plants such as tomatoes and lettuce, whether grown in soil or hydroponically.

Miracle-Gro Shake 'N Feed Tomato, Fruit & Vegetable Plant Food is designed to feed your plants for up to three months, which is convenient for gardeners who prefer less frequent applications. It contains calcium, an important nutrient that helps plants develop stronger cell walls, leading to better quality and longer-lasting fruits and vegetables. This fertilizer is suitable for a variety of plants including tomatoes, fruits, and vegetables, both in-ground and in container gardens, making it versatile for different growing setups.