10 Best Fertilizers For Tomatoes 2025 in the United States

Burpee Organic Tomato & Vegetable Granular Plant Food is a solid choice for those looking to boost the growth of their tomatoes and other vegetables in an organic way. With its granular form, it is easy to apply and releases nutrients consistently over a period of up to 3 months, which means less frequent applications are needed. This can be particularly advantageous for busy gardeners. Its OMRI listing ensures that it meets organic standards, making it suitable for environmentally conscious users.

One possible drawback is the lack of specific information about the N-P-K ratio in the provided details, which is crucial for those wanting to tailor their fertilization to precise plant needs. Additionally, while it is designed to produce superior results throughout the season, the effectiveness can vary depending on the initial soil conditions and compatibility. Gardeners with highly specific soil pH requirements might need to conduct a soil test and adjust accordingly.

In summary, Burpee Organic Tomato & Vegetable Granular Plant Food is a long-lasting, easy-to-use fertilizer that is well suited for organic gardening, but users should ensure it meets their specific soil and nutrient needs.

The General Hydroponics Flora Grow, Bloom, Micro Combo Fertilizer is a versatile choice for tomato cultivation. With a liquid form and a 2-1-2 N-P-K ratio, it provides essential nutrients tailored to different growth stages. This synthetic fertilizer includes a complete range of primary, secondary, and micronutrients, which is beneficial for achieving enhanced yields and better crop quality. Additionally, the product is pH balanced, simplifying the maintenance of optimal soil conditions for tomato plants.

It is suitable for both hydroponic and soil cultivation, offering flexibility depending on your growing setup. The highly purified concentrates ensure maximum solubility, which can improve nutrient uptake by the plants. However, as a synthetic fertilizer, it may not appeal to those strictly seeking organic gardening solutions. The product comes in a substantial 1-gallon pack of three, which can be heavy for some users to handle.

This fertilizer is a good fit for both amateur and experienced gardeners looking to boost their tomato crop's flavor, nutrition, aroma, and essential oil content.

The MasterBlend 4-18-38 Complete Combo Kit is a well-regarded fertilizer choice for tomato plants, used by professionals worldwide. Its N-P-K ratio of 4-18-38 is ideal for tomato growth, emphasizing strong root development and fruit production. The kit includes calcium nitrate (15.5-0-0) and Epsom salt (magnesium sulfate), which provide essential calcium and magnesium, crucial for preventing common tomato issues like blossom end rot and improving plant health.

The fertilizer is 100% water-soluble, making it easy to apply and ensuring quick plant uptake. This aspect is particularly useful for home gardeners who may not have advanced equipment for fertilizer application. Additionally, the product is synthetic, which means it can provide consistent and precise nutrient delivery, although it may not be suitable for those strictly adhering to organic gardening practices. The mixing ratio of 1:1:0.5 (MasterBlend: Calcium Nitrate: Epsom Salt) is clearly specified, simplifying the preparation process. However, the need to mix three components might be a bit cumbersome for beginners.

In terms of soil pH compatibility, while the product does not specifically mention pH adjustment, the presence of calcium nitrate can help in slightly acidic soils, which is beneficial for tomato growth. The packaging is designed for bulk use, which is great for larger gardens but might be too much for smaller home garden setups. This fertilizer is best suited for serious home gardeners and small-scale farmers looking for a comprehensive nutrient solution for their tomatoes.