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.

General Hydroponics CALiMAGic is a liquid fertilizer specially designed to supply calcium and magnesium, two essential nutrients that tomatoes need to grow healthy and avoid common problems like blossom end rot and tip burn. It has an N-P-K ratio of 1-0-0, meaning it provides a small amount of nitrogen but no phosphorus or potassium, so it’s best used alongside a complete tomato fertilizer rather than on its own. This product is synthetic and highly soluble, making it easy to mix into hydroponic systems or soil without clogging drip lines or sprayers.

Its main strength is preventing calcium deficiency, which is a common cause of tomato fruit issues. However, since it doesn't contain phosphorus or potassium, it won’t support all stages of tomato growth by itself. Also, while it’s not specifically designed to adjust soil pH, it can be safely added to most growing environments. This fertilizer doesn’t provide micronutrients beyond calcium and magnesium, so you might need to supplement other minerals separately.

If you’re growing tomatoes hydroponically or in soil and want to avoid calcium-related problems, CALiMAGic is a solid choice to add to your feeding routine. Keep in mind it’s a specialized supplement rather than a full fertilizer solution.