Best Fertilizer For Leafy Vegetables: 10 Options Compared

#1 · Best Overall

1. True Organic Herb & Leafy Greens Food

• Form: Granules
• Weight: 3 lb

Best for: Organic herbs and leafy greens.

Why it ranks #1: Formulated specifically for herbs and leafy greens; its 4% nitrogen blend includes 3% slow-release nitrogen plus listed phosphate, potash, calcium, and sulfur.

A formula explicitly made for herbs and leafy greens is the central draw of True Organic Herb & Leafy Greens Food. Its 4% nitrogen, including 3% slow-release nitrogen, pairs with phosphate, potash, calcium, and sulfur for garden beds covering up to 70 square feet.

The stated nutrient analysis—4% nitrogen, 4% phosphate, 6% potash, 7% calcium, and 1% sulfur—gives leafy crops a broader blend than a nitrogen-only meal. Three percent slow-release nitrogen supports a steadier supply within that formula. Granules make this a soil-applied option for gardens, and the four-pound bag is listed to cover 70 square feet. Its organic ingredients include seabird guano, shrimp and crab shell meal, and poultry manure, and the product is specifically aimed at greens and herbs.

Skip it if you need a nitrogen-only blood meal for a larger leafy crop area; True Organic Blood Meal covers 104 square feet per its title.

This is a strong fit for gardeners growing herbs and leafy greens in an organic garden, especially when the stated 70-square-foot coverage matches the planting area. Check that coverage against your garden size.

Listed on Amazon as: True Organic Herb & Leafy Greens Food – Organic Fertilizer for Abundant Herbs and Greens – 4lb Bag Covers 70 Sq. Ft.

#2 · Best Nitrogen Boost

2. Down To Earth Blood Meal

• Form: Powder
• Weight: 8.6 oz

Best for: Small organic nitrogen applications.

Why it ranks #2: The 12-0-0 organic blood meal is identified for leafy greens and other heavy feeders, making its nitrogen-focused soil application a close crop fit.

A 12-0-0 nitrogen analysis makes Down To Earth Blood Meal a focused option for leafy greens and other heavy feeders. Its OMRI Listed, all-natural formula is intended for soil application, and the half-pound size suits smaller gardens, containers, or targeted feeding.

The 12-0-0 analysis concentrates on nitrogen, which the listing connects with vigorous leafy growth and correcting deficiencies during early growth. Its powder form can be broadcast or hand applied and mixed into the soil surface, then watered in, so it calls for soil incorporation rather than dissolving as a liquid feed. OMRI listing and sustainably sourced, all-natural ingredients suit organic gardening. The compact package is aimed at small gardens and containers, while application requires care to avoid plant burn.

Skip it if you want balanced liquid nutrients for roots and foliage; TPS Nutrients 10-10-10 Vegetable Fertilizer supplies equal nitrogen, phosphorus, and potassium.

Choose this blood meal for a small organic garden or targeted soil feeding of nitrogen-hungry leafy crops. Its concentrated nitrogen and soil-application method call for careful handling, especially when applying around plants.

Listed on Amazon as: Down To Earth All Natural Fertilizers Organic Blood Meal – 12-0-0, 0.5 lb

#3 · Best Large Bag

3. True Organic Blood Meal

• Form: Granules
• Weight: 3 lb

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Best for: Nitrogen for hungry leafy crops.

Why it ranks #3: This 3-pound blood meal is described for heavy-feeding spinach, broccoli, and leafy greens, with a stated coverage of 104 square feet.

True Organic Blood Meal is a high-nitrogen fertilizer aimed at rapid vegetative growth in heavy-feeding crops such as spinach, broccoli, and leafy greens. The three-pound bag is listed to cover 104 square feet, making its stated coverage useful when planning a garden application.

The blood meal ingredient and high-nitrogen focus target lush, green vegetative growth, with leafy greens, spinach, broccoli, and corn named as suitable heavy feeders. That crop emphasis fits gardeners seeking foliage development rather than a general-purpose plant food. The product is supplied as granules, and its title states coverage of 104 square feet per three-pound bag, helping gardeners gauge the listed application area. True Organic also describes its plant foods as beneficial to soil and microbial activity.

Skip it if you want a balanced organic blend for leafy greens; True Organic Herb & Leafy Greens Food includes nitrogen, phosphate, potash, calcium, and sulfur.

Select this for a nitrogen-focused feeding of heavy-feeding leafy crops when its stated 104-square-foot coverage suits your garden. Its blood-meal focus is the key boundary if you need balanced nutrients beyond nitrogen.

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

#4 · Best Liquid Nitrogen

4. TPS Nutrients High Nitrogen Fertilizer

• Form: Liquid

Best for: Liquid feed for leafy growth.

Why it ranks #4: Its high-nitrogen liquid formula is explicitly intended to promote leafy growth and is described as suitable for leafy greens, herbs, and vegetable plants.

High nitrogen in a liquid formula is the defining feature of TPS Nutrients High Nitrogen Vegetable Fertilizer, supporting lush foliage during leafy and early vegetative growth. It suits gardeners feeding leafy greens, herbs, and other vegetable plants who want a fertilizer focused on above-ground growth.

The liquid form gives this fertilizer a different handling format from the granules and powders in this roundup, while its high-nitrogen focus targets foliage development. That combination fits gardeners prioritizing leafy growth in vegetables and herbs rather than seeking a broadly balanced formula. The listing also describes support for healthy plant development and vitality, making it relevant through vegetative stages. The supplied details do not specify a feeding schedule, so follow the product directions when applying it.

Skip it if you want equal nitrogen, phosphorus, and potassium; TPS Nutrients 10-10-10 Liquid Plant Food provides balanced nutrients for roots, foliage, and harvests.

Choose this liquid fertilizer if leafy greens, herbs, and vegetative growth are your priority. Its high-nitrogen emphasis is the key fit consideration: gardeners seeking balanced nutrition for roots and harvests should look to a 10-10-10 option instead.

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

#5

5. Dr. Earth Organic 5

• Form: Granules
• Weight: 4 lb

Best for: Organic beds and containers.

Why it ranks #5: This organic vegetable and herb granule contains beneficial soil microbes and feeds for several months; the supplied directions include vegetable gardens and containers.

A blend of organic ingredients and beneficial soil microbes sets Dr. Earth Organic 5 apart for gardeners tending vegetables, herbs, and containers. Its granules feed for several months, making it a fit for planting and established garden spaces where a sustained organic feed is preferred.

The granule form suits use in organic vegetable gardens, raised beds, containers, and native backyard soil, giving gardeners several planting contexts for one fertilizer. Its listed pro-biotic strains and ecto- and endo-mycorrhizae add beneficial soil organisms alongside primary plant nutrients. The product feeds for several months, which supports a longer feeding interval than an instant water-soluble feed. It is also described as suitable for compost tea, extending its use beyond direct garden application.

Skip it if you want an instant water-soluble boost; Miracle-Gro Water Soluble All Purpose Plant Food starts working instantly when used as directed.

Pick Dr. Earth for an organic vegetable or herb garden, raised bed, or container planting where a multi-month granular feed and soil microbes fit your approach. Its granule format is less suited to an instant feeding routine.

Listed on Amazon as: Dr. Earth Organic 5 Tomato, Vegetable & Herb Fertilizer Poly Bag

#6

6. Miracle-Gro Water Soluble All Purpose

• Form: Powder
• Weight: 1.5 lb

Best for: Quick boost for mixed plants.

Why it ranks #6: The 24-8-16 water-soluble powder includes vegetables among its intended plants and starts working instantly, though it is not specifically formulated for leafy crops.

Instant-starting, water-soluble feeding is the defining feature of Miracle-Gro All Purpose Plant Food. Its 24-8-16 formula works across indoor and outdoor plants, including vegetables, making it a practical option for gardeners who feed leafy crops alongside other plants.

The water-soluble powder starts working instantly, offering a quick feeding approach for gardeners who want to apply nutrients through water rather than use granules. Its 24-8-16 NPK formula is suitable for indoor and outdoor plants, including vegetables, houseplants, flowers, and trees, so one product can serve mixed plantings. The listing says it will not burn plants when used as directed. It is an all-purpose formula, rather than a fertilizer specifically formulated for leafy greens.

Skip it if you want a leafy-greens-specific organic fertilizer; True Organic Herb & Leafy Greens Food is formulated for herbs and greens.

This suits gardeners seeking a quick, water-soluble feed for vegetables alongside indoor and outdoor plants. Its broad all-purpose use is convenient for mixed collections, but leafy-greens specialists may prefer a crop-specific formula.

Listed on Amazon as: Miracle-Gro Water Soluble All Purpose Plant Food, 1.5 lb.

#7

7. TPS Nutrients 10-10-10 Liquid

• Form: Liquid
• Weight: 8 oz

Best for: Balanced liquid garden feeding.

Why it ranks #7: Its equal nitrogen, phosphorus, and potassium formula supports roots and foliage across garden crops, but the balanced blend is less targeted to leafy growth.

Equal nitrogen, phosphorus, and potassium in a liquid fertilizer distinguish TPS Nutrients 10-10-10 Vegetable Fertilizer. That balanced formula supports roots, foliage, and crop development, while its listed uses include garden beds, raised planters, rows, and container vegetables.

The 10-10-10 ratio supplies equal parts of the three primary nutrients, linking the formula to root support, healthy leaves, and productive harvests rather than emphasizing nitrogen alone. Its liquid form offers an alternative to granular plant foods, and the product is listed for beds, raised planters, rows, and containers. That range of garden settings makes it useful for mixed vegetable layouts. The supplied details do not specify an application interval, so follow the product directions.

Skip it if you mainly want a nitrogen-focused feed for leafy growth; TPS Nutrients High Nitrogen Vegetable Fertilizer is specifically focused on foliage.

This is a fit for vegetable gardeners who want balanced liquid feeding across roots, foliage, and harvest development, including in containers. Choose a high-nitrogen formula instead if leafy growth is your main feeding priority.

Listed on Amazon as: 10-10-10 Fertilizer for Vegetables, Complete Liquid Plant Food, 8 oz

#8

8. GroMaster 10-10-10 Plant Food

• Form: Granules
• Weight: 5 lb

Best for: Steady feed for mixed gardens.

Why it ranks #8: The granular 10-10-10 blend has 50% slow-release nitrogen and is described for vegetable gardens, but does not single out leafy vegetables.

Fifty percent slow-release nitrogen gives GroMaster 10-10-10 All Purpose Plant Food its steady-feeding focus, with feeding stated for up to three months. The balanced granules also include micronutrients, fitting vegetable gardens and mixed plantings that need broader nutrition.

The equal 10-10-10 NPK ratio supports roots, growth, and harvests, while the slow-release portion of nitrogen supplies nutrients steadily for up to three months. That extended feeding window can reduce how often gardeners need to reapply fertilizer. The listing also says slow-release nitrogen reduces the risk of fertilizer burn, and added trace elements support plant development across a variety of crops. Its all-purpose formula fits mixed plantings better than a leafy-greens-only feeding plan.

Skip it if you want a fertilizer formulated specifically for herbs and leafy greens; True Organic Herb & Leafy Greens Food targets those crops.

Choose GroMaster for mixed vegetable gardens where balanced granules, slow-release nitrogen, and micronutrients suit a longer feeding interval. Its all-purpose focus is less targeted if your garden consists solely of leafy greens.

Listed on Amazon as: 10-10-10 All Purpose Plant Food, 5 lb, with Slow-Release Nitrogen, for Vegetable Gardens and Mixed Plantings

#9

9. Miracle-Gro Shake 'N Feed

• Form: Granules
• Weight: 1.3 lb

Best for: Longer-feeding edible gardens.

Why it ranks #9: This vegetable granule feeds for up to three months and includes calcium, but its stated tomato, fruit, and vegetable focus is less specific to leafy greens.

Feeding for up to three months is the practical distinction of Miracle-Gro Shake 'N Feed Tomato, Fruit & Vegetable Plant Food. Its granules can be used in garden beds or containers, while micronutrients and calcium target plant strength and edible-crop quality.

The granule format and stated feeding period of up to three months make this a choice for gardeners who want a longer interval between applications. It works in both ground plantings and containers, so the same product can serve beds and potted vegetables. Natural ingredients feed soil microbes, while added micronutrients support growth and calcium helps form stronger cell walls. The formula is aimed at tomatoes, fruit, and vegetables, not leafy greens alone.

Skip it if you need a leafy-greens-specific organic blend; True Organic Herb & Leafy Greens Food is formulated specifically for herbs and greens.

This fits gardeners feeding edible plants in beds and containers who value a granule feed lasting up to three months. Consider its broad tomato, fruit, and vegetable focus if leafy greens are your only crop.

Listed on Amazon as: Miracle-Gro Shake 'N Feed Tomato, Fruit & Vegetable Plant Food, 1 lb.

#10

10. FoxFarm Happy Frog

• Form: Granules
• Weight: 4 lb

Best for: Vigorous vegetable feeders.

Why it ranks #10: The 5-7-3 granule is aimed at vigorous vegetable feeders and fruit development, so its supplied description fits fruiting crops better than leafy vegetables.

FoxFarm Happy Frog combines a 5-7-3 blend with calcium and mycorrhizal fungi for vigorous vegetable feeders. Its listed focus spans vegetative and flowering stages, supporting abundant fruit development, so it suits gardeners growing leafy crops alongside tomatoes, vegetables, or berries.

The 5-7-3 blend is paired with calcium and mycorrhizal fungi, giving this granular fertilizer more than a nitrogen-only focus. FoxFarm describes it for vigorous feeders including tomatoes, vegetables, and berries, and says it supplies nutrients during vegetative and flowering stages to support fruit development. Calcium is also highlighted in the product title alongside support for preventing blossom end rot. These features make it a fit for mixed vegetable gardens, though its stated fruit-production emphasis may be more than leafy-only growers need.

Skip it if you grow only leafy greens and want a greens-specific formula; True Organic Herb & Leafy Greens Food is made for herbs and greens.

This suits vegetable gardeners growing vigorous feeders across vegetative and flowering stages, especially when fruit development is also a goal. Leafy-only growers should weigh that emphasis against a fertilizer formulated specifically for greens.

Listed on Amazon as: FoxFarm Happy Frog Tomato & Vegetable Fertilizer – Vegetable Fertilizer for Vigorous Feeders, 5-7-3 Blend with Calcium & Mycorrhizal Fungi, Supports Abundant Fruit Development, 4 lb