Best Nitrogen Rich Fertilizer For Plants: Liquid and Granular Picks

#1 · Best Overall

1. The Grow Co Urea Fertilizer

• Form: Granules
• Weight: 5 lb

Best for: Granular high-nitrogen coverage.

Why it ranks #1: Its 46-0-0 analysis provides a clearly stated high nitrogen concentration, and the listed uses span grass, vegetables, fruits, and flowers.

A 46-0-0 urea ratio in a 5-pound granular package delivers a clearly high-nitrogen option for gardeners seeking greener foliage and vigorous growth. The Grow Co lists grass, vegetables, fruits, and flowers among its uses, giving this plant food a wider crop range than a vegetable-only formula.

The granular form and 5-pound weight make this a solid-format choice for gardeners planning use across several plant types, including grass, vegetables, fruit, and flowers. Its 46-0-0 ratio identifies a concentrated nitrogen focus, while the listed benefits include greener leafy growth and support for larger flowers and yields. That combination fits buyers prioritizing nitrogen-driven development; the formula’s zero phosphorus and potassium values make its nutrient profile specifically nitrogen-led.

Skip it if you want added sulfur and soil acidification for acid-loving plants; The Grow Co Ammonium Sulfate 21-0-0 lists both.

Pick this granular urea for gardeners seeking a nitrogen-focused product across lawns, vegetables, fruits, and flowers. Its 46-0-0 profile is the key fit consideration for anyone choosing among fertilizers with different nutrient balances.

Listed on Amazon as: 5 lb. Urea Fertilizer 46-0-0, High Nitrogen Fertilizer for Plants, Ideal Plant Food Nitrogen for Grass, Vegetable, Fruits, and Flowers – Promotes Greener Plant Color and Vibrant, Lush Growth

#2 · Best Liquid

2. TPS High Nitrogen Liquid

• Form: Liquid

Best for: Indoor and outdoor liquid feeding.

Why it ranks #2: This liquid formula supports foliage and growth across indoor and outdoor plants, lawns, vegetables, and trees, making its stated use broad.

Liquid nitrogen support for both indoor and outdoor plants gives this TPS Nutrients formula a wider stated setting range than a lawn-only feed. It is listed for houseplants, lawns, vegetables, and trees, with lush foliage and vigorous growth as its central goals.

The liquid form offers a different handling format from the granular fertilizers in this roundup, while the listed indoor and outdoor suitability covers houseplants as well as lawns, vegetables, and trees. Its high-nitrogen focus connects to the product’s stated support for greener leaves, strong stems, and vegetative growth. The 8-ounce title size makes it a small-bottle option for mixed plant care, rather than a large-format choice for extensive treatment areas.

Skip it if you need a 5-pound granular fertilizer for multiple crop types; The Grow Co 46-0-0 Urea Fertilizer is listed for grass, vegetables, fruits, and flowers.

Choose this liquid for gardeners managing a mix of houseplants and outdoor plantings who want nitrogen support for foliage and stems. The 8-ounce size is the fit consideration for anyone treating a large lawn or garden.

Listed on Amazon as: High Nitrogen Fertilizer – Liquid Plant Food for Rapid Growth, 8 oz

#3 · Water-Soluble Pick

3. RAW Nitrogen Powder

• Form: Powder
• Weight: 2.08 oz

Best for: Targeted soluble nitrogen feeding.

Why it ranks #3: The water-soluble powder contains 20% ammonium nitrogen and is described for leaf and stem development during vegetative growth.

A water-soluble formula with 20% ammonium nitrogen gives RAW Nitrogen a targeted place in vegetative feeding programs. This 2-ounce powder is described as supporting healthy leaf and stem development, making it a compact option for growers who want nitrogen supplementation integrated into an existing routine.

The powder form and water-soluble description suit a workflow where the fertilizer is incorporated into a feeding program rather than handled as a granular soil amendment. Its 20% ammonium nitrogen content connects directly to the stated aim of replenishing nitrogen during vegetative growth, with leaf and stem development as the practical focus. The 2-ounce package is compact, so it makes more sense for targeted supplementation than for gardeners seeking a large quantity for broad coverage.

Skip it if you want a 5-pound granular fertilizer for lawns and multiple crop types; The Grow Co 46-0-0 Urea Fertilizer is supplied in that size.

Consider RAW Nitrogen if you want a small, soluble nitrogen supplement for vegetative feeding and leaf or stem development. Its 2-ounce size is the main boundary for growers planning to treat a large garden area.

Listed on Amazon as: RAW Nitrogen Fertilizer – Water Soluble, Fertilizer for Vegetables, 2 oz

#4 · Organic Blood Meal

4. True Organic Blood Meal

• Form: Granules
• Weight: 3 lb

Best for: Organic leafy-greens feeding.

Why it ranks #4: This granulated blood meal is described as organic, supplies nitrogen for rapid vegetative growth, and covers 104 square feet per bag.

Blood meal supplies the high-nitrogen focus behind this 3-pound organic-input fertilizer, aimed at rapid vegetative growth in heavy feeders. True Organic names corn, spinach, broccoli, and leafy greens as suitable plants, so it fits gardeners prioritizing lush growth in nitrogen-hungry crops.

The granular form lets this blood meal be handled as a soil fertilizer, and the 3-pound bag is stated to cover 104 square feet, helping gardeners match the package to a defined bed area. Its high-nitrogen purpose aligns with the listed heavy-feeding crops, while the verified soil-health description says plant foods can increase microbial activity. The product is made with organic inputs, but handling instructions and application rates are not supplied in the product facts provided.

Skip it if you want an OMRI-listed blood meal specifically; Burpee Organic Blood Meal Fertilizer is listed for organic use.

This is a fit for gardeners feeding heavy-feeding leafy crops who want a granular blood meal with stated square-foot coverage. Keep the listed non-consumption warning in mind, and check the product’s directions before applying.

Listed on Amazon as: True Organic Blood Meal – High-Nitrogen Organic Fertilizer for Rapid Vegetative Growth – 3lb Bag Covers 104 Sq. Ft.

#5

5. Burpee Organic Blood Meal

• Form: Granules
• Weight: 3 lb

Best for: OMRI-listed vegetable gardeners.

Why it ranks #5: Its OMRI Listed blood meal is a natural nitrogen source, with listed uses including tomatoes, spinach, broccoli, and leafy greens.

OMRI listing for organic use gives Burpee Organic Blood Meal a clear fit for gardeners seeking a natural nitrogen source for vegetables. The 3-pound granules are named for crops such as lettuce, kale, squash, and corn, and are also described as a starter fertilizer for fruiting plants.

The granular blood meal can be mixed with potting soil according to the supplied directions, making it relevant to gardeners preparing soil for additional nitrogen support. Its OMRI listing supports use in organic gardening, while the product description identifies leafy vegetables and fruiting plants such as tomatoes, eggplant, squash, and melons. Handling requires care: the supplied safety information advises avoiding skin and eye contact and using gloves and a mask, a practical consideration during preparation.

Skip it if you prefer a blood meal with stated coverage of 104 square feet; True Organic Blood Meal supplies that coverage figure.

Burpee suits organic gardeners preparing potting soil or feeding nitrogen-hungry vegetables and fruiting plants. Its handling guidance is part of the decision: use protective gear as stated, and select it for the crops listed.

Listed on Amazon as: Burpee Organic Blood Meal Fertilizer | Add to Potting Soil | Excellent Natural Source of Nitrogen | for Tomatoes, Spinach, Broccoli, Leafy Greens | 3 lb, 1-Pack

#6 · Sulfur Soil Aid

6. The Grow Co Ammonium Sulfate

• Form: Granules
• Weight: 4 lb

Best for: Acid-loving plant soil care.

Why it ranks #6: The 21-0-0 granules also supply 24% sulfur and are specifically described for acidifying soil and use with acid-loving plants.

A 21-0-0 ratio paired with 24% sulfur makes this ammonium sulfate fertilizer a specific choice for gardeners seeking nitrogen and soil acidification together. The Grow Co lists it for acid-loving plants and highly alkaline soil, where its sulfur content is tied to lowering pH.

The granular form and 4-pound weight give buyers a substantial package for soil-focused garden use, while the 21-0-0 ratio identifies the nitrogen content. Its 24% sulfur content connects the product to the stated soil-acidifying purpose, making it particularly relevant for acid-loving plants and highly alkaline soil. That combined nutrient and pH focus is useful only where those goals fit the planting conditions, so the listed acidifying role is a central selection boundary.

Skip it if you want high nitrogen without the listed soil-acidifying sulfur focus; The Grow Co 46-0-0 Urea Fertilizer has a nitrogen-only listed ratio.

Choose this granular ammonium sulfate when your planting needs nitrogen and soil acidification, especially for acid-loving plants in highly alkaline soil. Its pH-lowering purpose is the key boundary to consider before use.

Listed on Amazon as: Ammonium Sulfate High Nitrogen Fertilizer for Plants Rapid Growth, 5lb

#7

7. GS Plant Foods Amino Power

• Form: Liquid

Best for: Plant-based nitrogen spraying.

Why it ranks #7: Its 14-0-0 formula uses plant-based amino acids and is described for turf, vegetables, fruits, and berries.

Plant-based amino acids from 18 L-amino acids distinguish GS Plant Foods Amino Power Powder from blood-meal fertilizers, offering a nitrogen source with natural chelating agents and no animal byproducts. Its directions name hose-end, backpack, and handheld sprayers, providing several application-tool options.

The plant-based amino acid ingredients and natural chelating agents give this product a specific formulation for gardeners seeking nitrogen without animal byproducts. Directions allow application with a hose-end sprayer, backpack, or handheld sprayer, so users can choose among those listed tools for their treatment workflow. The specifications identify item form as liquid, despite “Powder” in the product title; buyers should use the supplied directions and product labeling to guide handling rather than infer a form from the name alone.

Skip it if you need a clearly stated 46-0-0 granular urea ratio; The Grow Co Urea Fertilizer lists that ratio and granular form.

This is a fit for buyers seeking plant-based nitrogen and sprayer application options for turf, vegetables, fruits, or berries. Note the title and item-form discrepancy, and rely on product labeling for the format and handling.

Listed on Amazon as: Amino Power Powder Nitrogen Fertilizer – Plant Based High Nitrogen Fertilizer for Plants – All Natural Nitrogen Source and chelating Agent – Suitable for Turf, Vegetables, Fruits & Berries

#8

8. TPS Nitrogen Liquid

• Form: Liquid
• Weight: 8 oz

Best for: Outdoor foliage and lawn care.

Why it ranks #8: This liquid nitrogen supplement is positioned for lawns, gardens, and crops, with listed support for green leaves and steady growth.

Liquid nitrogen support in an 8-ounce bottle gives gardeners a straightforward way to add this essential nutrient to lawns, vegetables, and outdoor plants. TPS Nutrients positions it around green leaves and steady growth, making it a broad-use option for plantings where foliage development is the priority.

The liquid form makes this a different workflow from the granular nitrogen options in this roundup, while its stated suitability for lawns, gardens, and crops gives it broad outdoor reach. Its nitrogen-focused formula supports leaf development and overall plant growth, so it suits gardeners aiming to maintain green foliage across mixed plantings. The 8-ounce size is a compact choice for targeted use, though buyers managing extensive areas should weigh that bottle size against their coverage needs.

Skip it if you need a 5-pound granular supply for broad coverage; The Grow Co 46-0-0 Urea Fertilizer comes in that size.

Choose this for outdoor gardeners seeking liquid nitrogen support across lawn, vegetables, and other plants, especially when greener foliage is the aim. The 8-ounce bottle is a more compact choice than a bulk granular supply.

Listed on Amazon as: Nitrogen for Plants – Liquid Fertilizer for Deep Green Growth, 8 oz

#9

9. TPS High Nitrogen Vegetable Fertilizer

• Form: Liquid

Best for: Leafy vegetable gardeners.

Why it ranks #9: This 8-ounce liquid is tailored to leafy greens, herbs, and vegetable plants, a narrower fit than broad-use nitrogen options.

A high-nitrogen liquid formula focused on leafy growth gives vegetable gardeners a targeted option for greens, herbs, and other vegetable plants. TPS Nutrients describes it for vegetative development and plant vitality, so it fits gardeners who want nitrogen support during leafy stages rather than a general-purpose plant food.

The product’s emphasis on leafy growth connects its high-nitrogen formula to the early and vegetative stages called out in its description. Its liquid form offers a different handling format from granular vegetable fertilizers, while its stated suitability for leafy greens, herbs, and vegetables provides a clear garden use case. The 8-ounce title size suits gardeners considering a smaller bottle for those crops, not a bulk bag for wide-area treatment.

Skip it if you need nitrogen for turf and a wider range of outdoor plants; TPS NUTRIENTS Nitrogen for Plants lists lawn, garden, and crops.

This suits vegetable growers who want liquid nitrogen support for leafy greens, herbs, and other vegetables during vegetative development. If lawn or mixed outdoor coverage is central, choose a product whose listed uses include those areas.

Listed on Amazon as: High Nitrogen Vegetable Fertilizer – Promotes Lush Growth, 8 oz

#10

10. USEDGDIG Prilled Urea

• Form: Granules
• Weight: 0.88 kg

Best for: Resealable urea for smaller gardens.

Why it ranks #10: Its 46-0-0 analysis is high, but the listed directions are limited to turf and vegetables or flowers, and it lacks broader product detail.

A resealable 1.9-pound bag combines 46-0-0 urea with storage for the remainder, making USEDGDIG a compact option for nitrogen-focused indoor and outdoor plant care. Its listed directions give separate amounts for turf and vegetables or flowers, helping buyers see distinct use rates.

The granular form and resealable bag support storing unused fertilizer between applications, while the 46% minimum nitrogen content identifies a concentrated nitrogen source for plants and flowers. The directions specify 1/5 pound per 1,000 square feet for turf and 2.5 cups per 100 square feet for vegetables or flowers, giving users crop-specific measures to follow. Keep the safety guidance in view: the product should be kept from children and pets and not ingested.

Skip it if you need a 5-pound urea package for broader supply; The Grow Co Urea Fertilizer comes in a 5-pound size.

This suits gardeners seeking a resealable, smaller urea supply for indoor or outdoor plants, turf, vegetables, or flowers. Follow the listed crop-specific directions and safety guidance, particularly when storing the remaining product.

Listed on Amazon as: 1.9LB Prilled Urea Fertilizer 46-0-0 Nitrogen Bloom Booster Plant Food for Indoor/Outdoor Plants and Flower Gardens – Fruit to Stimulate Growth and Deep Green Color