Best Nitrogen For Fruit Trees: 10 Options Compared

#1 · Best Overall

1. GARDENWISE Citrus Fertilizer

• Weight: 16 oz
• Form: Granules

Best for: Balanced Citrus And Micronutrient Feed.

Why it ranks #1: Citrus-specific granules list 6-4-6 NPK plus magnesium, sulfur, and trace micronutrients, giving fruit trees more than nitrogen alone.

A 6-4-6 NPK analysis paired with listed magnesium, sulfur, and trace elements gives this granular fertilizer a broader nutrient profile for citrus trees. GARDENWISE names orange, lime, avocado, and lemon, making it a targeted option for growers seeking more than nitrogen alone.

The guaranteed analysis lists 6% nitrogen, 4% available phosphate, and 6% soluble potash, providing a balanced NPK profile rather than a high-nitrogen-only formula. Magnesium, sulfur, boron, copper, iron, and manganese add named nutrients to that blend. Its granular form and citrus focus suit growers feeding citrus alongside other listed garden plants, while the supplied information does not state application timing or a dose for individual trees.

Skip it if you want a citrus-tree product with a stated twice-yearly routine; Miracle-Gro Fruit & Citrus Plant Food Spikes provides that schedule.

Choose this for citrus growers looking for a balanced NPK blend with named micronutrients and use beyond trees. Its listed crop range is broad, but tree-specific application instructions are not supplied here.

Listed on Amazon as: GARDENWISE Professional Citrus Fertilizer + Vital Micronutrients; Perfect Balanced NPK for All Citrus; for Indoor and Outdoor Plants; Orange, Lime, Avocado and Lemon Tree Fertilizer (1 lb~ 1/2 qt.)

#2 · Best Concentrate

2. Farmer's Secret Citrus Booster

• Weight: 11.2 oz
• Form: Liquid

Best for: Weekly Citrus Concentrate.

Why it ranks #2: Formulated for citrus and highly concentrated; directions specify weekly drip-line feeding, with a reduced dose for container trees.

One teaspoon diluted in a gallon of water gives this concentrated liquid citrus fertilizer a clear weekly routine for outdoor and container trees. Farmer’s Secret names lemons, limes, and oranges, with separate guidance to halve the dose or feed every other week for indoor container trees.

The directions distinguish first-season trees, mature trees, and indoor or container citrus: first-season trees receive one teaspoon weekly, mature trees up to two teaspoons weekly, and container trees half the dosage or an every-other-week application. Applying along the drip line makes the target area clear. The concentrate can also be applied as a foliar or soil application, giving growers options for use, while the handling guidance calls for keeping it away from children and pets.

Skip it if you want a granular organic citrus fertilizer applied every four to eight weeks; Jobe’s Organics Granular Garden Fertilizer lists that interval.

A strong fit for citrus owners who want a concentrated liquid and explicit guidance for tree age and container growing. The weekly outdoor routine requires regular attention, while container trees have separate reduced-dose directions.

Listed on Amazon as: Farmer's Secret Citrus Tree Booster Fertilizer – Super Concentrated – Formulated for All Citrus Trees Including All Types of Lemons, Limes, and Oranges – Outdoor and Indoor/Container Trees (8oz)

#3 · Best Spike Format

3. Miracle-Gro Fruit & Citrus Spikes

• Weight: 3.8 lb
• Form: Sticks

Best for: Twice-Yearly Citrus Tree Feeding.

Why it ranks #3: Made for fruit and citrus trees including apple, orange, lemon, lime, and avocado, with a twice-yearly feeding format.

Preformed fertilizer spikes give citrus and fruit trees a ground-applied feeding option that does not require mixing liquid concentrate. The formula is listed for apple, orange, lemon, lime, and avocado trees, and its twice-a-year schedule offers a defined routine for gardeners who prefer infrequent applications.

The label directions call for watering the soil around the tree’s drip line until softened, then spacing the number of spikes specified by the label at least three feet apart. Driving each spike below the soil surface completes the placement process. Those steps make the feeding location clear, while the twice-yearly schedule reduces application frequency. The product also suits palm trees, although its fruit-tree positioning centers on citrus and the listed fruit varieties.

Skip it if you want a liquid feed mixed into weekly watering; Farmer's Secret Citrus Tree Booster gives a weekly dilution routine.

A sensible fit for citrus and listed fruit-tree owners who want a twice-yearly spike routine and can place feed around the drip line. Follow the label’s spike count and spacing directions for each tree.

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

#4 · Best Organic Granules

4. Jobe's Organics Granular Fertilizer

• Weight: 4 lb
• Form: Granules

Best for: Organic Granules For Fruit Trees.

Why it ranks #4: Its 3-5-5 formula is designed for fruit and citrus, is OMRI listed, and the directions call for application every 4-8 weeks.

An OMRI-listed 3-5-5 granular formula makes Jobe’s Organics a fruit-and-citrus option for gardeners seeking fertilizer approved for use in certified organic food production. Its directions call for application every four to eight weeks or as needed, offering a recurring schedule without weekly liquid mixing.

The 3-5-5 analysis supplies nitrogen, phosphorus, and potash, while the product is specifically formulated for fruit and citrus plants and trees. Granules avoid the water-mixing step of liquid feeds; the supplied information also notes that granular fertilizers typically have slower-to-release components and last longer. Organic gardeners can value the OMRI listing and stated use in certified organic food production, while the four-to-eight-week interval calls for periodic reapplication rather than a twice-yearly approach.

Skip it if you want citrus spikes applied just twice yearly; Miracle-Gro Fruit & Citrus Plant Food Spikes specifies that lower-frequency routine.

This fits organic gardeners feeding fruit and citrus trees who prefer granules and a recurring application interval. The four-to-eight-week schedule means it is not a set-and-forget, twice-yearly feeding option.

Listed on Amazon as: Jobe’s Organics Granular Garden Fertilizer, Easy Plant Care Fertilizer for Fruit and Citrus Plants and Trees, 4 lbs Bag

#5

5. Farmer's Secret Fruit & Bloom Booster

• Weight: 11.2 oz
• Form: Liquid

Best for: Fruit And Bloom Concentrate.

Why it ranks #5: Suitable for fruit-producing plants and applied every 2-4 weeks, but its listed emphasis is phosphorus and potassium rather than high nitrogen.

A teaspoon diluted into two gallons of water makes this concentrated liquid a practical option for gardeners feeding fruit trees alongside flowering plants. Its phosphorus-and-potassium emphasis supports root development and fruit or bloom production, while the listed directions fit into an existing watering routine every two to four weeks.

Farmer’s Secret recommends applying the diluted formula during regular watering, so it can join a routine already used for citrus, avocados, and other fruiting plants. The concentrate’s high phosphorus and potassium content focuses the product on roots, flowering, and fruit production rather than nitrogen alone. That makes it a useful fit when a tree needs broader fruit-and-bloom support, but its stated dilution and schedule require measuring and mixing rather than simply placing feed at the drip line.

Skip it if you want a citrus-specific formula with weekly application directions; Farmer's Secret Citrus Tree Booster specifies that routine.

Choose this for a mixed fruit garden where root development and flowering matter alongside feeding. Its broad plant coverage is useful, but gardeners seeking a nitrogen-focused product or a citrus-only schedule should consider a different formula.

Listed on Amazon as: Farmer’s Secret Fruit & Bloom Booster Fertilizer – Super Concentrated – Boosts Flowering and Yield on All Varieties of Fruits, Vegetables and Flowers (8oz)

#6

6. The Grow Co Urea Fertilizer

• Weight: 5 lb
• Form: Granules

Best for: High-Nitrogen Urea For Foliage.

Why it ranks #6: The 46-0-0 granular formula supplies high nitrogen for fruits and other plants, but it lacks the balanced nutrients listed in citrus-specific options.

A 46-0-0 nitrogen analysis makes this granular urea a focused choice for gardeners seeking greener, more vigorous leafy growth in fruit trees. The Grow Co also lists vegetables, flowers, and grass, giving a single high-nitrogen product wider garden use beyond the orchard.

The 46-0-0 analysis supplies nitrogen without listed phosphorus or potassium, aligning the product with its stated emphasis on correcting nitrogen deficiency and encouraging greener leafy growth. Granules offer a different handling format from a liquid concentrate, while the broad listed use across fruits, vegetables, flowers, and grass can suit a garden with several plant types. The supplied information does not give a tree-specific application schedule, so buyers should not assume a dosing routine from the title alone.

Skip it if you need a citrus fertilizer with a stated tree-feeding routine; Miracle-Gro Fruit & Citrus Plant Food Spikes specifies twice-yearly application.

Consider it when nitrogen support and greener foliage are the priority across fruit trees and other garden plants. Its listed uses are broad, but the supplied directions do not establish a fruit-tree dose or schedule.

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

#7

7. Cz Garden Supply Urea

• Weight: 0.1 milligrams
• Form: Granules

Best for: Resealable Urea For Garden Use.

Why it ranks #7: This 46-0-0 water-soluble urea is listed for fruit and citrus trees, though the supplied directions do not provide a tree-specific dose.

A resealable, easy-pour package and water-soluble 46-0-0 urea make Cz Garden Supply’s product a practical high-nitrogen choice for fruit trees and wider garden use. Its listed applications include citrus, vegetables, lawns, and flowers, with tie-dye and batik projects also noted.

The 46-0-0 analysis centers the formula on nitrogen, and the product information links it to lush growth across indoor and outdoor flowers, vegetables, lawns, fruit, and citrus trees. Water solubility supports use where dissolved fertilizer is desired, while resealable packaging helps contain the remaining granules between applications. The supplied directions mention use typically every four to six weeks and application to wet or dry soil, but the listed five-pound quantity per area is not tailored specifically to individual fruit trees.

Skip it if you need a citrus-tree-specific dose and schedule; Farmer's Secret Citrus Tree Booster gives directions by tree age and container status.

Consider this for growers who want high-nitrogen urea across fruit trees and other garden plants, with a resealable package for storage. Its broad-area directions do not specify a tailored dose for an individual tree.

Listed on Amazon as: 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

#8

8. GS Plant Foods Amino Power

• Form: Liquid

Best for: Plant-Based Amino Nitrogen.

Why it ranks #8: The plant-based 14-0-0 nitrogen source suits fruits and berries, but the supplied details do not give a fruit-tree application schedule.

Plant-based amino acids and natural chelating agents distinguish GS Plant Foods Amino Power Powder from conventional urea options for gardeners seeking a plant-derived nitrogen source. The product is listed for turf, vegetables, fruits, and berries, and its directions name hose-end, backpack, and handheld sprayers.

The ingredients identify 18 L-amino acids, plant-based nitrogen, and natural chelating agents, with no animal byproducts stated. That combination is relevant to buyers choosing a plant-based nitrogen source for fruit trees and other listed crops. Application directions support several spray workflows, including hose-end, backpack, and handheld equipment, which can suit different garden sizes and access needs. The supplied details do not specify a dilution rate or application schedule, so they do not establish a tree-specific feeding routine.

Skip it if you want a stated weekly citrus-tree dose; Farmer's Secret Citrus Tree Booster provides directions for outdoor and container trees.

Choose this if a plant-based nitrogen source and spray application options matter for fruit trees or other listed crops. The available details identify ingredients and equipment but leave the dilution and feeding schedule unspecified.

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

#9

9. TPS Nutrients High Nitrogen

• Form: Liquid

Best for: Large-Volume Liquid Tree Feed.

Why it ranks #9: A gallon of liquid high-nitrogen feed is listed for trees, but the available description does not specify fruit-tree use or a nutrient ratio.

A one-gallon liquid format gives TPS Nutrients’ high-nitrogen plant food a substantial supply for gardeners feeding trees alongside lawns, vegetables, or houseplants. The formula is presented for indoor and outdoor plants, with its nitrogen focus aimed at greener foliage, vigorous growth, and strong stems.

The high-nitrogen formula is tied to vegetative growth, including lush foliage and strong stems, which can make it relevant when leafy development is the goal for a fruit tree. Its indoor-and-outdoor listing also supports use across houseplants, lawns, vegetables, and trees, reducing the need to switch products across those settings. It is liquid and supplied in a gallon quantity, but the provided information does not include a dilution rate or application schedule for tree feeding.

Skip it if you need clear tree-dosing directions before purchase; Farmer's Secret Citrus Tree Booster specifies dilution and weekly application.

This suits growers seeking a larger liquid supply for trees and other indoor or outdoor plants, especially when vegetative growth is the aim. The missing supplied dosing schedule is a boundary for buyers who need precise instructions.

Listed on Amazon as: High Nitrogen Fertilizer – Liquid Plant Food for Rapid Growth, 1 Gallon

#10

10. TPS Nutrients Nitrogen Support

• Weight: 8 oz
• Form: Liquid

Best for: Compact Liquid Nitrogen Support.

Why it ranks #10: This 8-ounce liquid supports general plant nitrogen needs, but the listed uses do not specifically identify fruit or citrus trees.

An eight-ounce liquid format gives TPS Nutrients’ nitrogen supplement a compact option for supporting green leaves and steady growth in garden plants. The listed uses include vegetables, turf, outdoor plants, and crops, while its stated purpose remains nitrogen support rather than a complete citrus-specific feeding program.

The formula is described as supplying nitrogen for leaf development and overall plant growth, tying its use to greener foliage and steady development. Its listed scope spans lawns, gardens, crops, vegetables, turf, and outdoor plants, which can suit a grower managing fruit trees alongside other plantings. The eight-ounce liquid package is easy to distinguish from larger-volume feeds, but the supplied information does not specify a dilution rate, application frequency, or fruit-tree-specific directions.

Skip it if you need explicit citrus-tree feeding directions; Farmer's Secret Citrus Tree Booster lists doses for first-season, mature, and container trees.

This is an option for growers seeking a compact liquid nitrogen supplement for mixed outdoor plantings. Buyers who require a defined fruit-tree dose or schedule should note that those instructions are not supplied.

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