Best Fertilizer For Avocado Tree: 10 Granule and Liquid Options

#1 · Best Overall

1. Miracle-Gro Shake 'N Feed

• Form: Granules
• Weight: 5 lb

Best for: Long-Interval Tree Feeding.

Why it ranks #1: Made for avocado, citrus, and mango trees, it feeds for up to three months and lists potassium, magnesium, sulfur, and iron.

Feeding that lasts up to three months is the defining convenience of Miracle-Gro Shake 'N Feed, giving avocado growers a longer interval between applications. Its granules are formulated for citrus, avocado, and mango trees, with use listed for both indoor and outdoor plants and container or in-ground growing.

The slow-release formula feeds for up to three months, so it suits growers who want a longer gap between feeding sessions. Potassium, magnesium, sulfur, and iron are included to help address common nutrient deficiencies, while the product also nourishes above and below the soil. Apply it to the root zone and water thoroughly, following the label rate; the granular form is intended for both container and in-ground trees.

Skip it if you want a liquid concentrate mixed into watering; Gardenera's Premium Liquid Avocado Plant Fertilizer uses a teaspoon per gallon.

Choose it if you want granular feeding for an avocado tree in a container or in the ground, with micronutrients and a feeding interval of up to three months. Application still requires root-zone placement and thorough watering.

Listed on Amazon as: Miracle-Gro Shake 'N Feed Citrus, Avocado, Mango Plant Food – Fertilizer for Container and In-Ground Plants, Citrus, Avocado and Mango Trees, 4.5 lbs.

#2 · Slow-Release Granules

2. FoxFarm Happy Frog

• Form: Granules
• Weight: 4 lb

Best for: Slow-Release Soil Microbe Blend.

Why it ranks #2: This avocado and citrus granule formula includes slow-release nitrogen and mycorrhizal fungi; directions give separate rates for established and younger trees.

Slow-release nitrogen paired with mycorrhizal fungi is the defining combination in FoxFarm Happy Frog Citrus and Avocado Fertilizer. It gives growers a granular option intended to fuel vegetative growth while supporting root efficiency, nutrient uptake, and water absorption across new and established trees.

The slow-release nitrogen supports vegetative growth without making the formula an immediate liquid feed. Mycorrhizal fungi are included to help increase root efficiency, which may enhance nutrient uptake and water absorption. The directions distinguish tree age: established trees receive one-half cup per foot of height, while younger trees receive one-quarter cup per foot, three times yearly. That makes the schedule adaptable to the tree's stage, though application requires measuring by height.

Skip it if you want a formula that specifically lists calcium to address blossom end rot; True Organic Citrus & Avocado Food contains 7% calcium.

Choose this granular blend if you want slow-release nitrogen and mycorrhizal fungi for a new or established avocado tree. Its height-based directions require measuring the tree and repeating application three times yearly.

Listed on Amazon as: FoxFarm Happy Frog Citrus and Avocado Fertilizer- OMRI Listed Citrus Fertilizer, Slow-Release Nitrogen, Calcium & Sulfur for Citrus & Avocado Trees – 4 lb

#3 · Organic Inputs

3. True Organic Citrus & Avocado

• Form: Granules
• Weight: 4 lb

Best for: Calcium-Focused Organic Granules.

Why it ranks #3: Its listed organic ingredients include seabird guano, fish bone meal, and shell meals, while the formula contains 7% calcium.

A 7% calcium formula intended to prevent blossom end rot is the key distinction of True Organic Citrus & Avocado Food. Its organic ingredients, including seabird guano and shell meals, make it a soil-oriented granular option for avocado growers seeking support for foliage, blossoms, and fruit.

The listed calcium level connects directly to the product's blossom-end-rot prevention claim, a useful focus for growers concerned about fruit health. Granules containing seabird guano, shrimp and crab shell meal, and other organic inputs are described as improving soil nutrients and plant growth. The product is listed for in-ground and container use, so the same type of food can serve different planting setups. Its stated coverage is 70 square feet per four-pound bag.

Skip it if you need a clearly stated recurring feeding schedule; FoxFarm Happy Frog Citrus and Avocado Fertilizer specifies three applications per year.

This fits growers seeking organic granules for container or in-ground avocado trees, especially when calcium and soil inputs are priorities. The supplied information does not state an application schedule, so it offers less guidance on timing.

Listed on Amazon as: True Organic Citrus & Avocado Food – Organic Fertilizer for Lush Foliage and Abundant Fruit – 4lb Bag Covers 70 Sq. Ft.

#4 · Micronutrient Liquid

4. HiThrive Avocado Fertilizer

• Form: Liquid
• Weight: 1.2 lb

Best for: Micronutrient Deficiency Routine.

Why it ranks #4: The liquid lists magnesium, sulfur, iron, manganese, and zinc, with dilution directions for routine use and visible deficiencies.

A tablespoon-per-gallon mixing direction and a defined application schedule set HiThrive's avocado fertilizer apart for growers who want a specific feeding routine. Its liquid formula contains magnesium, sulfur, iron, manganese, and zinc, with claims focused on lush growth, vibrant leaves, and preventing yellowing and stunted growth.

For routine feeding, mix one tablespoon per gallon of water and apply once or twice yearly, giving growers a clearly stated baseline. The product can also be sprayed on leaves, trunks, branches, and flowers until dripping occurs. For visible deficiency, the directions specify two tablespoons per gallon twice monthly until the issue resolves. Its five named micronutrients target common deficiency concerns while the product is also promoted for bigger, healthier fruit.

Skip it if you prefer root feeding on your usual watering schedule; Gardenera's Premium Liquid Avocado Plant Fertilizer gives a one-teaspoon-per-gallon root-feed direction.

Pick it if you value named micronutrients and explicit routines for both regular care and visible deficiency. Its spray directions cover several tree surfaces, but the deficiency schedule requires repeated applications until the issue resolves.

Listed on Amazon as: Avocado Fruit Tree Fertilizer for Bigger Fruits, 16oz

#5 · Indoor Liquid

5. Gardenera 3-1-2 Liquid

• Form: Liquid
• Weight: 8 oz

Best for: Indoor Organic Concentrate.

Why it ranks #5: This liquid concentrate is labeled for indoor avocado trees, gives a 3-1-2 ratio, and specifies one teaspoon per gallon.

A 3-1-2 concentrate with an organic-ingredient claim makes Gardenera's liquid avocado fertilizer a targeted choice for indoor tree growers. The label's one-teaspoon-per-gallon direction enables a small measured amount to be diluted for root feeding during a normal watering, rather than applied as dry granules.

The 3-1-2 balance provides the product's stated nitrogen, phosphorus, and potassium proportions for indoor avocado trees. Mixing one teaspoon into a gallon of water gives growers a defined dilution, and feeding at the roots during normal watering can fit an existing routine. The formula is described as entirely organic, while its liquid concentrate form keeps application tied to mixing and watering rather than spreading granules around the tree.

Skip it if you want a dry granular formula rather than mixing liquid; FoxFarm Happy Frog Citrus and Avocado Fertilizer comes in granules.

A good fit for indoor avocado growers seeking an organic liquid concentrate and a measured root-feeding routine. It is less convenient when you want to spread dry fertilizer, since this formula must be diluted and applied with water.

Listed on Amazon as: Premium Liquid Avocado Plant Fertilizer – 3-1-2 Concentrate for Indoor Plants and Flowers by Gardenera | Organic Plant Food for Avocado Trees – 8oz

#6

6. TPS Nutrients Avocado Liquid

• Form: Liquid

Best for: Liquid Root And Fruit Support.

Why it ranks #6: A liquid specifically named for avocado trees, it is described for indoor and outdoor use and supports roots, foliage, and fruiting.

Root development, foliage, and fruiting all feature in TPS NUTRIENTS' liquid avocado plant food, making it a focused option for growers seeking support across several stages of tree growth. The formula is listed for indoor and outdoor use, including potted plants, backyard trees, and garden landscapes.

This liquid fertilizer is positioned to support deep root development, healthy foliage, and overall plant strength. Its balanced nutrients also support flowering and fruiting, giving avocado growers a single product aimed at both vegetative growth and fruit development. The indoor-and-outdoor use listing covers potted trees as well as backyard and landscape plantings. Handling instructions call for gloves and eye protection, and the product must be kept away from children and pets.

Skip it if you need a stated mixing rate and schedule; HiThrive Avocado Fruit Tree Fertilizer specifies tablespoons per gallon and application frequency.

This suits avocado growers who want liquid nutrition aimed at roots, foliage, and fruiting across indoor pots and outdoor trees. The supplied details do not give a mixing rate or schedule, so it is less suited to shoppers seeking those directions upfront.

Listed on Amazon as: Avocado Tree Fertilizer – Complete Liquid Plant Food, 8 oz (250mL)

#7

7. Miracle-Gro Fruit & Citrus Spikes

• Form: Sticks
• Weight: 3.8 lb

Best for: Twice-Yearly Spike Feeding.

Why it ranks #7: The spikes are listed for avocado trees and are applied around the drip line; the product describes feeding twice a year.

Plant food spikes applied twice a year make Miracle-Gro Fruit & Citrus a direct option for avocado growers who prefer feeding without mixing liquid. The spikes are formulated for fruit and citrus trees, and their placement around the drip line gives application a defined location.

The product promotes fruit production and lush foliage, and its listed tree uses include avocado along with several citrus and fruit trees. Feeding is scheduled once in early season and once in the growing season, offering two set applications. The method requires softening the soil with water, spacing spikes at least three feet apart around the drip line, and driving each below the soil surface. Those steps make placement more involved than simply scattering granules.

Skip it if you want a spreadable granular fertilizer; True Organic Citrus & Avocado Food is listed in granules for in-ground and container use.

A fit for avocado owners who prefer twice-yearly spike feeding and can follow the drip-line placement steps. Choose another format if you do not want to soften soil and drive individual spikes below the surface.

Listed on Amazon as: Miracle-Gro Fruit & Citrus Plant Food Spikes, 12 Spikes, 3 lb.

#8

8. Gardenera 6-4-6 Plant Food

• Form: Granules

Best for: Balanced 6-4-6 Tree Food.

Why it ranks #8: Its 6-4-6 formula is marketed for citrus and avocado plants, but the supplied information does not give a detailed application rate.

Gardenera's 6-4-6 formula gives this citrus and avocado plant food a clearly stated nutrient balance for indoor and outdoor tree growing. Its all-season positioning and quick-release nitrogen suit growers looking for a granular option aimed at vigorous growth and yields across new and established plants.

The 6-4-6 balance identifies the formula's nitrogen, phosphorus, and potassium proportions, making its nutrient profile easy to compare with other tree foods. Quick-release nitrogen is the specified nitrogen form, while the product description connects the formula to vigorous growth and high yields. It is listed for indoor and outdoor gardening and for both new and established citrus and avocado plants. The supplied details do not provide an application rate or timing schedule.

Skip it if you want an explicit root-feeding dilution and watering routine; Gardenera's Premium Liquid Avocado Plant Fertilizer specifies one teaspoon per gallon.

Consider it if a stated 6-4-6 balance and quick-release nitrogen match your approach to indoor or outdoor avocado care. The supplied details do not give a rate or schedule, so you will not find application timing here.

Listed on Amazon as: BESTSELLER 6-4-6 Avocado Citrus Tree Plant Food for Outdoor/Indoor Gardening | Quick-Release Nitrogen Fertilizer | Orange, Lime, Avocado and Lemon Tree Fertilizer [8 OZ]

#9

9. Gardenwise 6-4-6 Fertilizer

• Form: Granules

Best for: Large-Volume 6-4-6 Granules.

Why it ranks #9: This granular 6-4-6 formula names avocado trees and indoor or outdoor gardening, though the 5-quart listing may suit larger needs.

A five-quart supply of 6-4-6 granular fertilizer distinguishes Gardenwise for growers feeding multiple citrus or avocado plants. The stated nitrogen, phosphorus, and potassium balance supports its focus on overall growth, flowering, and fruiting, with the product listed for indoor and outdoor trees.

The 6-4-6 blend gives indoor and outdoor avocado growers a specified nutrient balance, while the product also promotes flowering and fruiting. Its granular form suits buyers who prefer solid plant food, and the five-quart quantity is a substantial supply for broader garden use. The listed uses extend to potted citrus trees and orchard settings. Handling requires protective gloves and eyewear, and the supplied directions do not provide a complete schedule for every use.

Skip it if you want a small liquid concentrate rather than a large granular supply; TPS NUTRIENTS Avocado Tree Fertilizer is an 8-ounce liquid.

This suits growers with multiple avocado or citrus trees who want a 6-4-6 granular formula for growth, flowering, and fruiting. Its five-quart quantity makes it a better fit for broader garden use than a small-scale feeding need.

Listed on Amazon as: Gardenwise 6-4-6 Avocado and Citrus Tree Professional Fertilizer Plant Food for Outdoor/Indoor Gardening; Quick-Release Nitrogen Fertilizer; Orange, Lime, Avocado and Lemon Tree Fertilizer (5 QUARTS)

#10

10. GrowThrive Avocado Liquid

• Form: Liquid
• Weight: 350 g

Best for: Organic Liquid Soil Support.

Why it ranks #10: It is presented as an avocado liquid fertilizer with organic components, but its description also refers to tomato plants, making the use case less clear.

Active enzymes and organic components give GrowThrive's avocado fertilizer a soil-support focus alongside plant nutrition. This slow-release liquid is presented as a way to aid organic matter decomposition, support soil structure, and increase nutrient availability for roots in garden and container settings.

The organic probiotic liquid combines a slow-release plant-food format with a soil support blend intended to improve nutrient availability for roots. Active enzymes and organic components are described as aiding decomposition of organic matter and enhancing soil structure and microbial activity. The product is listed for garden and container use, giving it scope across different planting setups. Its claim to help prevent seedling burn and over-fertilization may appeal to growers concerned about feeding young plants.

Skip it if you need exact mixing and feeding directions; HiThrive Avocado Fruit Tree Fertilizer specifies a gallon-based dilution and application schedule.

Choose it if you want an organic liquid focused on soil activity and nutrient availability for an avocado tree in a garden or container. The supplied details do not give a dilution rate or schedule, limiting application guidance.

Listed on Amazon as: Avocado Fruit Tree Fertilizer – Organic Slow Release Liquid Plant Food,10oz