10 Best Fertilizer For Tomatoes 2025 in the United States

The Burpee Organic Tomato & Vegetable Granular Plant Food is designed to deliver long-lasting nutrients to your tomato plants, with a special formula that releases essential nutrients immediately and sustains them for up to 3 months. This product is OMRI listed for organic use, ensuring it's suitable for those who prefer environmentally friendly gardening options.

Its composition includes an NPK ratio that's balanced for plant health, helping tomatoes grow strong and produce bountiful yields. Additionally, the granular form makes it easy to apply, and it's versatile enough to be used with a variety of other vegetables. However, it's important to note that the product's effectiveness can depend on the specific soil pH of your garden, so it might be necessary to adjust your soil conditions for optimal results.

The large 4-pound package might be more than what small-scale gardeners need. Burpee’s longstanding reputation makes it a trusted choice for those looking to enhance their tomato garden organically.

FoxFarm Big Bloom is a liquid fertilizer designed primarily as a bloom booster, with a very low NPK ratio of 0.01-0.03-0.7, meaning it has minimal nitrogen and phosphorus but a moderate amount of potassium. For tomato plants, which often require balanced nutrients including nitrogen for leaf growth and phosphorus for root development, this fertilizer alone might not provide the full nutrient spectrum needed throughout the growing season. Its formula is organic-based, featuring earthworm castings and bat guano, which enriches the soil with natural micronutrients and beneficial microbes, supporting overall plant health. This can help improve root strength and enhance the flavor of tomatoes, a plus for gardeners aiming for tastier fruit.

The product is safe for both indoor and outdoor potted plants, easy to apply by mixing with water, making it user-friendly for beginners. However, it lacks a significant phosphorus content, which is important for young tomato plants to develop strong roots early on. Also, since it has a low nitrogen level, it might need to be supplemented with other fertilizers for leafy growth.

FoxFarm Big Bloom works well as a supplementary fertilizer to boost flowering and fruit quality in tomatoes but may require pairing with a more balanced fertilizer to cover the full nutritional needs of tomato plants, especially during early growth stages.

The FoxFarm Fertilizer Soil Trio Liquid Nutrient is a comprehensive pack of three different fertilizers designed to support the growth of tomatoes and other plants. It includes Grow Big for lush vegetative growth, Big Bloom for regular feeding, and Tiger Bloom for promoting abundant fruit and flower development.

The trio is a liquid concentrate, making it easy to apply with water, and the included Twin Canaries Conversion Chart helps users measure the right amounts for their plants. One of the strengths of this product is its organic certification (OMRI Listed and CDFA Registered), making it suitable for those who prefer environmentally friendly options.

The NPK ratios are designed to cover different growth stages, which is beneficial for tomatoes that require varying nutrients throughout their lifecycle. While it covers a broad range of soil pH levels, users with highly specific soil conditions may need to adjust accordingly. If you're looking for a versatile, organic fertilizer solution for your tomatoes, this trio could be a strong choice.