Gardeners Favorite Fertilizers for Tomatoes, Grow Big and Tasty Vegetables

Full of flavor and texture, tomatoes are one of the most satisfying fruits you can grow in a garden. But to have the most succulent fruit possible, you will need one essential thing first – the best fertilizer for your tomatoes.

While tomatoes come in all different shapes, sizes, and colors, they all require high nutrition. From rich nutrients and minerals to helpful bacteria and microbes, to blossom and root development, it’s no surprise that many organic fertilizers specialize in caring for tomato plants alone.

But with so much choice, how do you pick the best one to suit your needs?

We’ve picked 15 of the best fertilizers for your tomato plants below. The result will be stronger, healthier plants that yield bigger, tastier fruits – the dream of any ambitious gardener!

15 of The Best Fertilizers for Tomatoes:

1. Tomato-tone Organic Fertilizer

Tomato-tone Organic Fertilizer

Do you want healthier tomatoes plants with plumper, juicier fruit?

This tomato plant fertilizer contains thousands of living microbes that promote optimum growth and increase yields for all types of tomato plants – perfect for growing rich, tasty fruit.

With all 15 essential nutrients included, this is a long-lasting, slow-release fertilizer that is specifically formulated to encourage more flowers to grow on your tomato plants. With more flowers comes more fruit!

This organic fertilizer also contains 8% calcium which is important in preventing conditions such as blossom end rot. With no filler, and being 100% organic (no toxic or hazardous ingredients), this is the perfect organic fertilizer for tomatoes!

100% organic with no filler, sludges, hazardous or toxic ingredients makes this the perfect organic fertilizer for tomatoes.

2. Fox Farm Grow Big Liquid Concentrate Fertilizer FX14092, 6-4-4

Fox Farm Grow Big Liquid Concentrate Fertilizer FX14092, 6-4-4

Grow your tomato plants bigger and better, with Foxfarm’s liquid concentrate fertilizer. This fertilizer is specially designed to enhance plant size and structure, allowing for more abundant fruit, flower, and bud development.

It contains high quality and nutritious including earthworm castings, Norwegian kelp, and essential micronutrients.

It is suitable for both new and established plants, and with simple and clear instructions you can use this organic fertilizer with ease.

We are particularly impressed with its low pH value, which helps maintain the stability and storage of micronutrients for your plants. The result is more flowers, more fruit, and healthier plants – an ideal combination for any tomato plant.

3. Miracle-Gro Shake ‘N Feed Tomato, Fruits and Vegetables Plant Food

Miracle-Gro Shake 'N Feed Tomato, Fruits and Vegetables Plant Food

This organic fertilizer from Miracle-Gro contains all the natural materials your tomato plants will need to become strong, healthy, and productive.

This fertilizer contains all-natural ingredients that feed microbes directly into the soil for your tomatoes. Microbes break down natural ingredients into nutrients, and help support root strength and development, and increases water efficiency.

Specially formulated with micronutrients, this organic fertilizer will also help bolster plant strength and help it produce higher quality fruits versus unfed plants.

In particular, calcium is essential, as it helps form stronger cell walls. The result is tomato plants that grow stronger, more vertically, and produce higher quality fruit. It also helps prevent a multitude of calcium-deficiency diseases that tomato plants are particularly susceptible to.

This is an ideal organic fertilizer for both tomato plants in the ground and containers. Simply reapply the fertilizer every 3 months and water regularly for optimum, easy results.

4. Dr. Earth Organic & Natural MINI Home Grown Tomato Fertilizer, 4-6-3

Dr. Earth Organic & Natural MINI Home Grown Tomato Fertilizer

Another great tomato plant fertilizer to solve all your garden needs in one, impressive food supplement.

Enriched with a multitude of minerals, proteins, carbohydrates, humic acids, and trace elements used, your soils will become healthy and help sustain strong, vigorous tomato plants.

Infused with a broad spectrum of biological inoculants, this fertilizer renews, restarts, and rejuvenates tired soils. Probiotic beneficial soil microbes and mycorrhizae included playing a major role in how effective this organic fertilizer is.

Mycorrhizae play important roles in plant nutrition, soil biology, and soil chemistry and is a vital ingredient in optimum growth for tomato plants.

With no synthetic chemicals or toxic ingredients used, this fertilizer is both people and pet safe and is suitable for tomato plants both set in soil and containers.

5. Harris Organic Fish Fertilizer for Tomatoes, 3-3-0.3

Harris Organic Fish Fertilizer for Tomatoes

With high nutritional value, this organic fertilizer offers will have your tomato plants grow bigger and stronger, and bear succulent fruits with incredible ease.

How? As a fish fertilizer, this product uses trace minerals and micronutrients naturally derived from fish to stimulate healthy growth in the root system of your plants. The fish in question are all deep-water, bottom-feeders, which means added nutritional value.

Aside from the high nutritional value, we also love how versatile this fertilizer is. You can also apply it in a variety of ways including directly on to soil, foliar, or through a drip irrigation system. Regardless of how you water your plants, it can fit into your routine.

As this fertilizer is organic and safe, it will not burn or damage plants and is equally well suited for both indoor and outdoor plants. Whether you want to strengthen your plants, rebuild soil, or yield better fruits, this is an ideal organic fertilizer for tomatoes.

6. Neptune’s Harvest Tomato & Veg Fertilizer 2-4-2

Neptune's Harvest Tomato & Veg Fertilizer 2-4-2

Another high-quality fish fertilizer, Neptune’s Harvest Fertilizer uses fish freshly caught from the North Atlantic, bringing to it a host of natural, organic nutrients that plants can absorb easily.

The result is a noticeable increase in both stalk and stem mass and an increase in the volume of tomatoes produced. Additionally, the nutrients of this organic fertilizer are particularly effective in helping develop strong root zones in your tomato plants and lush foliage and blossoms.

This fertilizer is perfectly suited to help increase tomato plant tolerance to various diseases, temperatures, and drought issues. And with no assembly required, using this fertilizer is incredibly easy and uncomplicated.

This is an ideal fertilizer for both indoor and outdoor tomato plants, either in soil or in containers.

7. The Old Farmer’s Almanac Organic Tomato & Vegetable Plant Food Fertilizer, 8-4-8

The Old Farmer's Almanac Organic Tomato & Vegetable Plant Food Fertilizer

This fertilizer works in tandem with your soil to create optimal growing conditions for tomato plants. Its high protein nutrition is a core reason plants thrive and produce better, larger fruit.

We are particularly impressed with the high nutritional value of this fertilizer. 8% of nitrogen helps plants grow stronger and have a vibrant color. The 4% phosphorus helps grow healthier fruit and flowers to bloom, while the 8% potassium promotes strong roots to take hold.

The quick and slow release of nutrients designed in this fertilizer promotes consistent, healthy growth patterns for your crop over time. What’s more is this fertilizer does not use harsh chemicals, manure, or have any strong and unpleasant odors, making it suitable for both indoor and outdoor uses.

Each resealable bag fertilizes up to 250 sq. ft. of new or existing crops for up to 6-8 weeks, offering your garden incredible value and less time spent managing it.

8. Miracle-Gro Nature’s Care Organic & Natural Tomato Plant Food, 7-6-9

Miracle-Gro Nature's Care Organic & Natural Tomato Plant Food

Help your tomato plants grow fast and heart with Nature’s Care organic plant food. Bursting with essential nutrients and minerals, the quality and amount of your tomatoes will improve drastically with its help.

Added calcium found in this plant food improves the cell walls of your tomato plants, helping to strengthen them and improve their resistance to diseases. It also helps improve the quality of fruits.

This plant food works particularly well with hungry plants, as it acts fast and can be easily absorbed by roots. Made with natural and organic ingredients, this fertilizer works for up to 2 months and promises high quality, consistent results.

9. Jobe’s Organics Slow Release Tomato Food, 2-3-4

Jobe's Organics Slow Release Tomato Food

Specifically designed to enhance soil, stimulate growth, and increase disease resistance, this organic fertilizer for tomato plants is an all-round, high-quality product.

Jobe’s Biozome is a combination of healthy bacteria, Mycorrhizal fungi, and Archaea. This unique and proprietary blend of beneficial microorganisms improves the long-term quality of your soil and promotes plant growth in tandem with bolstering disease resistance.

How? It adds beneficial microbes that naturally re-establish a balance between plant and soil.

With no harmful chemicals that could potentially burn or damage plants, this plant food is pet and people friendly and is perfectly suited for organic gardening.

As a slow-release food, plants can be fed for up to 3 months. You’ll notice during this time an increase in both root mass and the plant’s foliage.

10. Monterey Tomato Blossom Spray, 0-0.2-0.08

Monterey Tomato Blossom Spray

An effective way of delivering essential nutrients to your tomato plants, this blossom spray from Monterey aims to promote more flowers and blossoms, leading to a much greater fruit yield.

This spray is formulated to decrease and prevent blossom end rot, which is an essential thing you need to protect your tomato plants. Blossom end rot is caused by a lack of calcium in fruits and leaves dark, unpleasant blotches on fruit.

To counter blossom end rot, your plants need a highly nutritious plant food like the one found in this spray. Additionally, this fertilizer is incredibly easy to use and will suit a variety of needs including outdoor and indoor tomato plants in soil and containers.

Not only that, this spray is effective in promoting growth in other blooming crops including strawberries, cucumbers, peppers, and eggplants; the perfect fertilizer for a varied, bountiful garden.

11. Miracle-Gro Performance Organics for Tomatoes, Vegetables, Herbs, and Fruits, 7-6-9

Miracle-Gro Performance Organics for Tomatoes, Vegetables, Herbs, and Fruits, 7-6-9

The truth is in the name, as this plant food’s nutritional value will boost the performance of your tomato plant tenfold in a safe, natural way.

How? The mix of natural and organic ingredients stimulates growth in your tomato plants, allowing them to grow stronger, healthier, and more vibrantly. Not only that, but fruits will arrive bigger and more succulent, too!

We love how simple it is to use this food, and how quickly you can see the difference. Simply apply dry and water in to start feeding. You’ll see visible results in 7 days vs. unfed potted plants.

This product can cover up to 220 sq. ft. of an area and is ideal organic fertilizer for tomatoes which are planted in pots and containers.

12. Burpee Organic Tomato and Vegetable Granular Plant Food

Burpee Organic Tomato and Vegetable Granular Plant Food

This granular plant food is formulated to feed plants quickly and deliver long-lasting results.

It’s easy-to-apply granulates release essential nutrients immediately, and which continues to provide a stream of plant food for up to 3 months – the perfect solution for vigorous growth all season long.

We think the high-quality makeup of beneficial microbes and nutrients is particularly impressive. Additional calcium helps improve plant health, strength, and root development. Surplus microorganisms also help improve soil conditions and foster healthy plant growth for a consistent green glow.

This plant food is particularly well suited for seed starting and younger plants, both in soil and in containers, and as such is an ideal organic fertilizer for tomato plants.

13. Purely Organic Tomato & Vegetable Plant Food, 8-8-8

Purely Organic Tomato & Vegetable Plant Food, 8-8-8

Grow your tomato plants quicker and with better fruits with this impressive, protein-based plant food for up to 8 weeks.

We love in particular the high-quality nutritional value found in this plant food, including 8% nitrogen for plant growth, 8% phosphorus for fruiting and blooms, and lastly 8% potassium for stronger root development.

Ideal for both indoor and outdoor use, this plant food covers up to 250 sq. ft., and is packaged in a resealable pouch for convenient storage when not in use. It also contains no harsh chemicals or unpleasant-smelling manure.

It’s a very versatile plant food that can help plants in a variety of climates and weather. A proven protein-based formula, Purely Organic’s plant food is very fast-acting and results in stronger plants and juicier fruits.

14. Jobe’s Tomato Fertilizer Spikes, 6-18-6

Jobe's Tomato Fertilizer Spikes, 6-18-6

Deliver a highly nutritious food plan to your plants with easy-to-use fertilizer spikes from Jobe.

These fertilizer spikes supply a continuous amount of nutrients directly to roots, stimulating their growth, and strengthening them.

We love how easy these fertilizer spikes are to install. Simply insert 2 spikes around a plant, 1” below soil level, and water afterward.

High-quality nutrients including nitrogen, phosphate, and potash help deliver a well-balanced diet for your tomato plants. The spikes are slow-release fertilizers, meaning that your tomatoes plants will continue to be nourished for up to 8 weeks.

18 spikes are included and are available in waterproof, resealable pouches or a cardboard blister card-pack, for efficient storage when not in use.

Fertilizer spikes are not wasteful and have no runoff or lost nutrients. This means all the nutrients it provides are directed at the plants themselves for maximum efficiency and value. Expect to see vigorous growth and a vibrant green pigment quickly.

15. EcoScraps Tomato & Vegetable Plant Food, 5-4-6

EcoScraps Tomato & Vegetable Plant Food

Developed to support all types of edible gardening, this plant food from EcoScraps is ideal for environmentally conscious gardeners as it has the added benefit of reducing waste in landfills.

We love how sustainable this plant food is; recycled leftovers from all parts of the food life cycle are included to reduce waste and upcycle essential nutrients to plants.

It’s distinctive, all-in-one clear particle makes for a clean, even, and easy application every time. And with no added manure, it’s a perfect fertilizer for tomatoes and other edibles in your garden.

Directions are simple and easy to follow. For tomato plants in containers, use 4 tsp. of plant food per gallon of potting soil. This food can be used for both new containers and established ones.

Fertilizing tomatoes

Best Fertilizers for Tomatoes Buying Guide:

With so much great choice, what should you look for in the best fertilizer for tomato plants?

Below we have some tips and ideas to keep in mind when looking for ideal plant food for your crop.

Organic fertilizers tomatoes – organic fertilizers come from once-living material, including animal and plant matter and manure. They provide an abundance of nutrients and minerals which plants can easily absorb.

Especially when considering edibles like tomatoes, you want an organic fertilizer that is safe and chemical-free, giving you peace of mind that the beautiful, juicy y fruits you’re harvesting are safe.

Not only that, many organic fertilizers are incredible environmentally efficient, reducing, and reusing waste to resupply the soil with lost nutrients.

Mycorrhizae – you might have seen this term in many of the above products. Mycorrhizae are a kind of fungus that plays a very important role in plant nutrition, soil biology, and soil chemistry. Located at the root, they help the plant absorb minerals such as phosphorus and also water.

The presence of mycorrhizae means that a plant fertilizer will be even more effective and is especially important to consider if your soil is nutrient-deprived.

Helpful Bacteria – you might think of sickness when you hear of bacteria. But for plants, bacteria mean healthier conditions to grow! Bacteria in soils help break down tough matter and release important nutrients which plants can then absorb. When picking an organic fertilizer for tomatoes, keep in mind that one containing bacteria which will improve soil quality tremendously.

Archaea – these microbes help clean the soil and return it to a healthier, more natural state. Typically found in harsh environments, archaea act in a similar way to bacteria, helping to break down minerals into easier forms for plants to then absorb. Simply put, the more you have of these, the better for your soil.

Bloom End Rot – Speaking of nutrients, one of the most common diseases a tomato plant may suffer is blossom end rot. Blossom end rot is when dark blotches appear on the end of the fruit. Blossom end rot is caused by a lack of calcium in the tomato plant.

Although one or two fruit may have blossom end rot, remember that the rest of the developing crop can still be saved. It’s important thus, to have a tomato plant food that is rich in calcium, that can help provide the necessary nutrition quickly.

Unrime tomatoes


For many gardeners across the world, tomato plants are the pride and job of their gardens and their greenhouses. Their lush vine-like structure, leafy foliage, and fragrant, fresh smell are, to say the least, very desirable!

Not only that, the delicious fruit they produce makes planting and caring for these plants an easy decision to make.

With every edible crop, you plant, you want to ensure it grows healthy, strong, and to its maximum potential. You also want to protect it from disease and malnutrition.

It stands to reason that only by using the best fertilizer for tomatoes will your tomato plants be well cared for and thrive. With the best fertilizer at hand, a bounty of fresh fruit is almost guaranteed.

The only thing left to do is what dish you’ll cook!