Best Nitrogen Garden Fertilizers of 2025

Steven Taylor Avatar
Steven Taylor
Last Updated: Jan 9, 2025

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Nitrogen garden fertilizers are an essential tool for any gardener looking to promote healthy plant growth. These fertilizers contain high levels of nitrogen, a crucial nutrient that plants need to produce chlorophyll and grow strong stems and leaves. Nitrogen garden fertilizers come in a variety of forms, including granular, liquid, and slow-release options, making it easy to find the perfect product for any gardening needs. Whether you're growing vegetables, flowers, or fruit trees, adding nitrogen garden fertilizers to your soil can help you achieve a thriving and bountiful garden.

At a Glance: Our Top Picks

Burpee Organic Blood Meal Fertilizer Cover #TOP 1
Burpee Organic Blood Meal Fertilizer
ftb score rating icon 9.9
The Grow Co Urea Fertilizer 46-0-0, 5 lb. Cover #TOP 2
The Grow Co Urea Fertilizer 46-0-0, 5 lb.
ftb score rating icon 9.8
Cz Garden 5-10-10 Tomato & Vegetable Fertilizer Cover #TOP 3
Cz Garden 5-10-10 Tomato & Vegetable Fertilizer
ftb score rating icon 9.6

Top 10 Nitrogen Garden Fertilizers

#TOP 1

Burpee Organic Blood Meal Fertilizer

Organic Blood Meal Fertilizer |
Blood Meal (3lbs)
3 lb
Burpee Organic Blood Meal Fertilizer Cover
Burpee Organic Blood Meal Fertilizer | Add to Potting Soil | Excellent Natural Source of Nitrogen | for Tomatoes, Spinach, Broccoli, Leafy Greens | 3 lb, 1-Pack

Burpee Organic Blood Meal Fertilizer is an OMRI listed starter fertilizer and natural source of nitrogen for green garden vegetables, colorful flower blooms, fruiting plants, and soil health. This 12-0-0 formulation supports plant growth and yield while also promoting soil microorganisms. Additionally, the product can serve as a natural repellent for garden critters such as deer, rabbits, and moles. Burpee guarantees the quality and success of all gardeners with their non-GMO, expertly-selected gardening supplies.

What We Like
OMRI listed for organic use
Supports plant growth and yield
Promotes soil microorganisms
Serves as a natural repellent for garden critters
Non-GMO, expertly-selected gardening supplies
#TOP 2

The Grow Co Urea Fertilizer 46-0-0, 5 lb.

TGC-UREA-G
The Grow Co Urea Fertilizer 46-0-0, 5 lb. Cover
Urea Fertilizer 46-0-0, High Nitrogen Fertilizer for Plants, Ideal Plant Food Nitrogen Fertilizer for Grass, Vegetable, Fruits, and Flowers, Promotes Greener Plant Color and Rapid, Lush Growth, 5 lb.

Grow Co Urea Fertilizer, with a 46-0-0 ratio, promotes rapid & lush growth in your plants. It enhances vibrant, greener color, maximizes plant health, and provides premium nutrients for indoor & outdoor plants. This fertilizer is derived from premium Urea, ensuring quick absorption and bigger blooms & crops. For beautiful, healthy plants, use Grow Co Urea Fertilizer.

What We Like
Rapid & lush growth
Vibrant, greener color
Maximizes plant health
#TOP 3

Cz Garden 5-10-10 Tomato & Vegetable Fertilizer

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Cz Garden 5-10-10 Tomato & Vegetable Fertilizer Cover
5-10-10 Tomato & Vegetable Fertilizer - Made in USA - Nitrogen, Phosphorus, Potassium Plant Food for Indoor/Outdoor Plants & Flower Gardens - Promotes Vigorous Growth and Big Blooms!

Cz Garden Fertilizer is a premium quality plant food suitable for indoor and outdoor plants. The powerful formula promotes vigorous growth and bigger blooms in your home garden. It features slow-release technology, ensuring a steady nutrient supply without the risk of fertilizer burn. The resealable packaging makes it convenient to use and store for future gardening needs.

What We Like
Premium quality ingredients
Promotes vigorous growth
Slow-release formula
#TOP 4

RAW Nitrogen

RAW
HGC717891
Nitrogen
2 Ounce
RAW Nitrogen Cover
RAW Nitrogen 2oz - Plant Nutrient for Deficiency Treatment and Enhanced Growth in Vegetative Stage - Indoor, Outdoor, Hydroponic Use

RAW Nitrogen Plant Nutrient is a highly effective solution for treating deficiencies and promoting plant growth during the vegetative stage. As a macro element, nitrogen plays a crucial role in the development and overall health of plants. It can quickly address nitrogen deficiency issues by providing an immediately available nutrient source for the plant. This nutrient is easily soluble and can be mixed into water without any hassle. RAW Nitrogen is not only essential for the production of chlorophyll, amino acids, and enzymes, but it is also great for treating individual deficiencies. Whether you are growing plants in soil, hydroponics, or other media, this product is suitable for all. Additionally, it can be used as a foliar feed to rapidly restore the greenness of plant leaves. With RAW Nitrogen Plant Nutrient, you can ensure optimal plant development and growth.

What We Like
Effective for treating deficiencies
Promotes overall plant development
Quickly soluble in water

Milorganite Slow-Release Fertilizer

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white
32 Pounds
Milorganite Slow-Release Fertilizer Cover
Milorganite All-Purpose Eco-Friendly Slow-Release Nitrogen 6-4-0 Fertilizer, 32 Pound Bag - for Lawns, Flowers, and Gardens

The Milorganite Slow-Release Fertilizer is an eco-friendly solution that aids in root development and contains non-staining iron, perfect for garden fertilization. This fertilizer has a fertilizer analysis of 6-4-0, and feeds your plants for up to 3 months, ensuring optimal growth and health.

What We Like
Eco-friendly solution
Aids in root development
Contains non-staining iron
Feeds for up to 3 months
#TOP 6

Cz Garden Urea Fertilizer for Indoor/Outdoor Plants

OF-EIFE-LQ8Y
Green
Cz Garden Urea Fertilizer for Indoor/Outdoor Plants Cover
Urea Fertilizer 46-0-0 Made in USA - 5LB Plant Food for Indoor/Outdoor Flowers & Gardens - Promotes Lush Growth - Lettuce, Green Lawns, Fruit, Vegetables, Citrus Trees, Tie Dye Granules Prills

Cz Garden Urea Fertilizer is a premium quality, water-soluble, high-purity nitrogen fertilizer that promotes lush growth in indoor flowers, lawn, and garden vegetables. It's not just a high nitrogen fertilizer; it's also perfect for tie-dye and batik projects. The fertilizer comes in a resealable, easy-pour 5lb pouch, making it easy to use and store. Cz Garden Organics is dedicated to creating high-quality soil amendment blends, fertilizers, and nutrients for organic gardening.

What We Like
Premium quality, high-purity nitrogen fertilizer
Promotes lush growth in indoor flowers, lawn, and garden vegetables
Can be used for tie-dye and batik projects
#TOP 7

The Grow Co Ammonium Sulfate 21-0-0 Fertilizer

Ammonium Sulfate 21-0-0
The Grow Co Ammonium Sulfate 21-0-0 Fertilizer Cover
Ammonium Sulfate 21-0-0 Fertilizer, High Nitrogen Fertilizer for Plants Rapid Growth & Deep Greener Color, Ideal Ammonium Sulfate Fertilizer & Soil Acidifier to Lower pH Levels in Alkaline Soil, 5 lb

Grow Co Ammonium Sulfate Fertilizer is a high nitrogen fertilizer that promotes rapid plant growth and vibrant green color. It acts as a great soil acidifier, perfect for plants thriving in acidic conditions. This fertilizer helps achieve lush greenery in plants and lawns, leading to bigger blooms and higher yields. It is derived from premium Ammonium Sulfate, ensuring the health of your plants. Easily apply the fertilizer for beautiful turf, gardens, flowers, shrubs, and trees' rapid growth.

What We Like
High nitrogen content
Improves soil health
Promotes lush growth
#TOP 8

The Dirty Gardener Nitrogen Fertilizer Urea

The Dirty Gardener Nitrogen Fertilizer Urea Cover
The Dirty Gardener Nitrogen Fertilizer Urea 46-0-0, 5 Pounds

The Dirty Gardener Nitrogen Fertilizer Urea is a high-quality, dry granular fertilizer that contains 46% nitrogen. It is perfect for fertilizing crops and can be spread easily using most fertilizer spreaders. However, it should only be used in areas with adequate water, as it tends to dehydrate the soil. The order comes with 5 pounds of urea, providing a sufficient amount for small-scale gardening projects.

What We Like
High-quality, pure prilled urea
Contains 46% nitrogen, ideal for fertilizing crops
Spreads easily with most fertilizer spreaders
#TOP 9

Gardenwise 10-10-10 All-Purpose Fertilizer

GARDENWISE
10 10 10 Fertilizer
1/2 quart
Gardenwise 10-10-10 All-Purpose Fertilizer Cover
Gardenwise 10-10-10 All-Purpose Professional Fertilizer Plant Food for Indoor/Outdoor Gardening; Premium Shrub, Tree, Flower, Vegetable and Lawn Fertilizer; Quick-Release Nitrogen (1/2 Quart)

Gardenwise All-Purpose Fertilizer is a versatile plant food perfect for both indoor and outdoor gardening. It features a balanced formula with equal parts nitrogen, phosphorus, and potassium, which supports all your gardening needs. You can enjoy up to eight weeks of sustained nutrition with its slow-release formula, making it easier for you to maintain your plants with fewer applications. The fine granules ensure even coverage for maximum absorption, allowing your flowers, vegetables, and shrubs to thrive. Plus, the quick-release nitrogen gives your plants an immediate boost for rapid growth, ensuring your garden flourishes beautifully.

What We Like
Versatile for various plants
Long-lasting nutrition
Even coverage granules
Quick growth results
#TOP 10

N-Primer Nitrogen Supplement for Fast Vegetative Growth

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Quart (32 oz)
N-Primer Nitrogen Supplement for Fast Vegetative Growth Cover
N-Primer Nitrogen Supplement for Fast Vegetative Growth, Promotes Dark Green Leaves by TPS Nutrients, Quart (32 oz)

TPS Nutrients N-Primer is a bio-available and sustainable nitrogen supplement that promotes fast vegetative growth and dark green leaves. It contains balanced positively and negatively charged nitrogen, and includes nitrogen injectors that increase nitrogen metabolism. This energy-dense fertilizer can be used for all plants during veg and early bloom, and is designed to reduce waste by ensuring that you don't pay for water to be shipped.

What We Like
Promotes fast vegetative growth
Increases nitrogen metabolism
Contains balanced positively and negatively charged nitrogen
Energy-dense fertilizer for all plants during veg and early bloom
Designed to reduce waste by ensuring you don't pay for water to be shipped
Buying Guide Image

The Best Nitrogen Garden Fertilizers for Every Budget

Introduction

If you're an avid gardener, you know that proper fertilization is essential for the growth and health of your plants. Nitrogen is one of the most important elements for plant growth, and using a nitrogen-based fertilizer can give your garden a much-needed boost. But with so many options on the market, it can be overwhelming to choose the right fertilizer for your garden. In this article, we'll go over some key factors to consider when selecting a nitrogen-based fertilizer for your garden.

Types of Nitrogen Fertilizers

One of the first things to consider when choosing a nitrogen fertilizer is the type of product you want to use. There are several different types of nitrogen fertilizers available, each with its own pros and cons. Some common types of nitrogen fertilizers include:

  • Synthetic fertilizers: These are chemical fertilizers made from synthetic ingredients. They are typically easy to apply and can provide plants with a quick burst of nitrogen, but they can also be harmful to the environment if not used properly.

  • Organic fertilizers: These are fertilizers made from natural materials, such as compost or manure. They are typically more environmentally friendly than synthetic fertilizers, but they may not provide plants with as much nitrogen as synthetic options.

  • Slow-release fertilizers: These are fertilizers that release nitrogen slowly over time, providing plants with a steady supply of the element. They are less likely to burn plants than synthetic fertilizers, but they may not provide as much immediate nitrogen.

Consider Your Plants' Needs

Another important factor to consider when choosing a nitrogen fertilizer is the specific needs of your plants. Different plants have different nitrogen requirements, so it's important to choose a fertilizer that provides the right amount of nitrogen for your specific plants. For example, fast-growing plants like tomatoes and peppers may benefit from a fertilizer with a higher nitrogen content, while slower-growing plants like roses and peonies may do better with a fertilizer that provides a lower amount of nitrogen.

It's also important to consider the stage of growth that your plants are in. During the vegetative stage, when plants are actively growing and producing leaves, they may need more nitrogen than during the flowering stage, when they are focusing on producing flowers and fruit.

Choose the Right Form

Another factor to consider when choosing a nitrogen fertilizer is the form of the product. Nitrogen fertilizers are available in several different forms, including liquids, granules, and slow-release pellets. Each form has its own advantages and disadvantages, so it's important to choose the right one for your garden.

Liquid fertilizers are easy to apply and can provide plants with a quick boost of nitrogen. However, they can be difficult to measure and may wash away quickly if it rains. Granular fertilizers are easy to measure and apply, but they can be difficult to distribute evenly in the garden. Slow-release pellets are more precise and provide a steady supply of nitrogen, but they can be more expensive than other forms of fertilizer.

Conclusion

Choosing the right nitrogen fertilizer for your garden can be a daunting task, but by considering the type of fertilizer, the needs of your plants, and the form of the product, you can find a fertilizer that will help your garden thrive. With the right nitrogen fertilizer, your plants will be well-fed and healthy, leading to a beautiful and bountiful garden.

Frequently Asked Questions (FAQs)

1. What is the best source of nitrogen for the garden?

The best sources of nitrogen for the garden are manures, ground-up animal parts (like blood meal, feather dust, and leather dust), and seed meals (such as soybean meal and cottonseed meal). These organic materials are rich in nitrogen and can provide the necessary nutrients for plant growth.

2. What can I add to my garden for nitrogen?

There are several options to add nitrogen to your garden, including manure, biosolids, compost tea, animal products, nitrogen-fixing plants, and commercial fertilizer. These sources can help enrich the soil with nitrogen, promoting healthy plant growth and development.

3. What plant fertilizer is high in nitrogen?

If you want to increase the nitrogen content of your soil, there are nitrogen-rich fertilizers available. Some examples include Ammonium Sulfate 21-0-0, Crustacean Meal 4-0-0, and Feather Meal 12-0-0. These fertilizers can provide a high concentration of nitrogen to support plant growth.

4. Is nitrogen fertilizer good for the garden?

Yes, nitrogen fertilizer is beneficial for the garden. Nitrogen is an essential nutrient for plants and plays a vital role in their growth. It is involved in the production of chlorophyll and photosynthesis, which are crucial for plant health. Lack of nitrogen can result in yellowing (chlorosis) of plants.

5. Are coffee grounds high in nitrogen?

Yes, coffee grounds are high in nitrogen content and can be beneficial for plants. When added to compost, they contribute organic matter that improves soil water retention. However, it's important to note that coffee grounds tend to be acidic, so they should be used in moderation and balanced with other amendments.

6. What is the fastest way to add nitrogen to soil?

There are several fast ways to add nitrogen to soil, including using blood meal or alfalfa meal, diluted human urine, manure tea, compost, chop-and-drop mulch, planting nitrogen-fixing plants, reducing tilling, and practicing polyculture. These methods can quickly increase the nitrogen levels in the soil, promoting plant growth.

7. Does Seasol have nitrogen?

Seasol is a fertilizer that contains a special blend of nitrogen (N), phosphorus (P), potassium (K), and trace elements. It helps promote vigorous growth, abundance of flowers, and healthy plant growth. The addition of seaweed in Seasol also stimulates strong root systems in plants.

8. Is Epsom salt a nitrogen fertilizer?

No, Epsom salt does not contain nitrogen, phosphorus, or potassium. It has an analysis of 0-0-0, meaning it lacks major nutrients required for plant growth. Spraying Epsom salt on plant foliage can even cause leaf scorch, so it is not recommended as a nitrogen fertilizer.

Editor's Notes

During our nitrogen garden fertilizer research, we found 24 nitrogen garden fertilizer products and shortlisted 10 quality products. We collected and analyzed 110,281 customer reviews through our big data system to write the nitrogen garden fertilizers list. We found that most customers choose nitrogen garden fertilizers with an average price of $17.90.

The nitrogen garden fertilizers are available for purchase. We have researched hundreds of brands and picked the top brands of nitrogen garden fertilizers, including Burpee, The Grow Co, Cz Garden Supply, RAW, Milorganite. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Written by
Steven Taylor Avatar

Steven Taylor grew up in a small town called Beaufort in South Carolina and his passion for building and woodworking has led him to master the latest garden gadgets. He always holds every chance to patch up or sand down his beloved garden. There are various novel technologies in his articles.