Best Foliar Spray For Citrus Trees: Compare 9 Formulas

#1 · Best Overall

1. Southern Ag Chelated Citrus Spray

• Weight: 8 lb

Best for: Multi-nutrient citrus correction.

Why it ranks #1: Specifically lists citrus use, five nutrients including iron and zinc, and dilution directions for prevention and correction.

Five named nutrients—iron, zinc, manganese, magnesium, and sulfur—give Southern Ag Chelated Citrus Nutritional Spray a defined role when citrus foliage shows yellowing or deficiency symptoms. Its one-gallon size suits growers making repeated diluted applications, while the instructions distinguish a lower preventive rate from a stronger corrective treatment.

The listed nutrient analysis identifies iron at 1.2%, zinc at 1.7%, manganese at 1.2%, magnesium at 1.0%, and sulfur at 4.1%, making its nutrient profile more explicit than a general-purpose mist. Directions call for 1–2 tablespoons per gallon of water and a thorough cover spray to runoff; the stated preventive rate is one tablespoon per gallon, one or two times yearly. It is also listed for avocados, mangoes, ornamentals, and other tropical fruit trees.

Skip it if you want a ready-to-use leaf spray; FOOP Mist Foliar Spray comes in a spray bottle, though its directions also specify dilution.

Choose this for citrus growers who want a named five-nutrient blend and directions for preventive or corrective spraying. It also suits other tropical fruit trees, but application requires water dilution and thorough coverage to runoff.

Listed on Amazon as: Southern Ag Chelated Citrus Nutritional Spray, 1 Gallon Size: 1 Gallon

#2 · Best Kelp Formula

2. GARDENWISE Marina Mist

• Form: Liquid
• Weight: 8 oz

Best for: Kelp mist for fruiting trees.

Why it ranks #2: Designed for citrus and fruiting trees, with an Ascophyllum nodosum kelp formula and listed nitrogen, potash, and trace nutrients.

Ascophyllum Nodosum seaweed is the defining ingredient in GARDENWISE Organic Marina Mist, giving citrus and fruit-tree growers an organic kelp-based foliar option. The product is presented for citrus and nut trees, with trace minerals and a gentle formula positioned for plant health and fruit production rather than as a single-nutrient deficiency treatment.

The liquid foliar spray is made from Ascophyllum Nodosum seaweed, which the supplied description says contributes minerals, vitamins, and amino acids. Its guaranteed analysis lists 0.3% total nitrogen and 0.6% soluble potash, plus trace nutrients, helping buyers assess its stated nutrient profile. The listing names citrus and fruiting trees, and its 8-ounce size is a smaller format for growers who want a kelp-based spray in their plant-care rotation. Yield improvements are product claims, not quantified outcomes.

Skip it if you want a listed five-nutrient corrective blend with dilution directions; Southern Ag Chelated Citrus Nutritional Spray specifies both.

This fits citrus and fruit-tree growers seeking an organic kelp foliar spray with a disclosed basic analysis. Consider it as a nutrient addition, not a specified corrective treatment: the supplied details do not give a mixing rate or application schedule.

Listed on Amazon as: GARDENWISE Organic Marina Mist Foliar Kelp Spray for All Citrus and Fruiting Trees | Micro Nutrients for Vital Health | Gentle Formula | Liquid Plant Food | Quick Results (8 OZ)

#3 · Best Iron Correction

3. Ferti-lome Chelated Iron

• Form: Liquid
• Weight: 16 oz

Best for: Iron deficiency foliage treatment.

Why it ranks #3: Targets iron deficiency and other nutrient deficiencies; verified directions include a foliage spray every two weeks for citrus in specified months.

Chelated iron gives Fertilome Liquid Iron & Micronutrients a specific use when foliage yellows from iron deficiency. The concentrate also supplies other key micronutrients, and its directions call for spraying both sides of leaves, making it relevant to citrus growers seeking targeted foliage correction rather than a complete fertilizer.

The concentrate mixes with water, with the foliar direction specifying one tablespoon per gallon and thorough coverage on both sides of the leaves. Its stated focus is correcting iron deficiency and other nutrient deficiencies, while the listing also names shrubs, lawns, trees, flowers, and vegetables. For citrus, the supplied verified information mentions application every two weeks during January and February. The product explicitly says it should not replace fertilizer, so treat it as a deficiency-focused supplement, not the sole feeding plan.

Skip it if you need a complete citrus feeding product; Farmer's Secret Citrus Tree Booster is presented as plant food for citrus trees.

For citrus growers addressing yellow foliage who can mix concentrate and spray both leaf surfaces, this offers a focused iron-and-micronutrient role. Keep a separate fertilizer in the care plan, since the product is not a fertilizer substitute.

Listed on Amazon as: Fertilome (10625) Chelated Liquid Iron & Micronutrients, 16 oz

#4 · Ready-to-Spray Mist

4. TPS Citrus Tree Spray

• Form: Liquid

Best for: Routine mist for potted citrus.

Why it ranks #4: Made for indoor and outdoor citrus including lemon, lime, and orange trees, and offered as a convenient 16-ounce liquid mist.

A liquid nutrient mist for indoor and outdoor citrus gives lemon, lime, and orange growers a straightforward way to add feeding to routine plant care. Its spray format targets foliage, while the stated focus on greener leaves and strong development makes it a practical choice for trees where leaf appearance is a priority.

The liquid spray format makes routine feeding a direct foliage-care step rather than a soil-only application. Its listed suitability for both indoor and outdoor citrus includes potted trees, so it can serve growers caring for a lemon indoors and an orange tree outside. The product description emphasizes balanced nutrition and healthy foliage, but does not provide a nutrient analysis or dilution rate here; follow the package directions for application rather than assuming a particular schedule.

Skip it if you need a stated nutrient analysis or mixing rate; Southern Ag Chelated Citrus Nutritional Spray lists five nutrients and dilution directions.

For citrus keepers who want a liquid mist for routine leaf care on indoor or outdoor trees, this is a focused option. Its supplied details do not specify nutrient percentages or a dilution rate, so consult the product directions.

Listed on Amazon as: Citrus Tree Fertilizer Spray, Fast-Acting Mist for Healthy Leaves, 16 oz

#5

5. TPS Lemon Tree Spray

• Form: Liquid

Best for: Misting for lemon foliage.

Why it ranks #5: Specifically addresses lemon trees and describes a convenient nutrient mist for indoor or outdoor citrus foliage.

A nutrient mist specifically named for lemon trees gives this TPS NUTRIENTS spray a narrower focus than general citrus products. Its liquid spray format supports routine feeding for potted lemon trees and garden citrus, while the stated benefits center on vibrant green leaves and steady plant development.

The liquid mist is presented for both potted lemon trees and garden citrus plants, giving indoor and outdoor growers a shared format for routine foliage care. Its description links balanced nutrition with healthy foliage and steady growth, while the spray application makes feeding a direct plant-care task. The supplied details do not provide a nutrient analysis, dilution rate, or application interval, so buyers who need a measured corrective program will need to rely on the product directions for those specifics.

Skip it if you need a stated nutrient analysis and preventive dilution directions; Southern Ag Chelated Citrus Nutritional Spray supplies both.

This suits lemon-tree keepers who want a simple liquid mist for routine foliage care indoors or outdoors. It is less informative for growers planning a measured deficiency treatment, since the supplied facts omit nutrient percentages and timing.

Listed on Amazon as: Lemon Tree Fertilizer Spray, Fast-Acting Mist for Healthy Leaves, 16 oz

#6 · Concentrated Citrus Feed

6. Farmer's Secret Citrus Booster

• Form: Liquid
• Weight: 11.2 oz

Best for: Concentrated weekly citrus feeding.

Why it ranks #6: Formulated for citrus and states that it can be applied by foliar or soil methods; directions specify one teaspoon per gallon.

A teaspoon per gallon is the stated starting dilution for Farmer's Secret Citrus Tree Booster, making its super-concentrated format suited to growers mixing small weekly feeds. The product covers indoor, container, and outdoor citrus, with separate guidance for first-season, mature, and container trees to shape routine application.

The instructions call for one teaspoon mixed into a gallon of water and applied weekly along the drip line; the additional product facts also permit foliar or soil application. First-season trees receive one teaspoon weekly, while mature trees can receive up to two, and indoor or container trees use half the dosage or an every-other-week schedule. This makes the directions adaptable to different citrus stages and settings, though it requires measuring and dilution rather than a ready-to-spray application.

Skip it if you want a direct-use spray bottle for leaf application; FOOP Mist Foliar Spray is sold as ready to use, with its own directions to dilute.

This suits citrus growers who prefer measured weekly feeding and want guidance for young, mature, or container trees. It can be applied foliarly or to soil, but its concentration means mixing and dosage decisions are part of the routine.

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)

#7

7. FOOP Mist Foliar Spray

• Form: Liquid
• Weight: 2 lb

Best for: Broad-use organic foliar mist.

Why it ranks #7: A ready-to-use, 32-ounce organic foliar product for general plants, but its listed directions call for dilution and do not identify citrus.

FOOP Mist delivers listed macronutrients, micronutrients, and soil-enriching microbes through plant leaves, making it a broad-use foliar option for growers managing more than citrus alone. Its spray-bottle format and stated use on indoor and outdoor plants suit plant-care routines that include citrus, seedlings, or clones.

The product says leaf delivery can shortcut the root system when addressing nutrient deficiencies, and it specifically calls out clones and seedlings with underdeveloped roots. Its 32-ounce spray bottle supports foliage application across indoor and outdoor plants, while directions say to dilute 50 mL in one gallon of water and spray leaves directly. That dilution instruction matters: despite the ready-to-use wording in the title, buyers should follow the supplied directions rather than assume the contents are applied undiluted.

Skip it if you want a citrus-specific formula with named nutrients; Southern Ag Chelated Citrus Nutritional Spray lists five nutrient percentages.

Choose this for growers who want a broad-use foliar product across indoor and outdoor plants, including young starts. Citrus is not singled out in the supplied details, and the listed dilution directions should guide use despite the title wording.

Listed on Amazon as: FOOP Mist Foliar Spray – Organic Plant Food in a Spray Bottle (with a Fresh Minty Scent) | Spray on Plants to Correct & Prevent Nutrient Deficiencies | Ready to Use, No Mixing (32oz)

#8

8. TPS Canopy Boost Spray

• Form: Liquid
• Weight: 2 lb

Best for: Canopy care for mixed plantings.

Why it ranks #8: Provides direct leaf application for indoor and outdoor plants, but the listed use is general rather than citrus-specific.

Direct leaf delivery is the core of TPS NUTRIENTS Canopy Boost, positioning it for growers who want foliage-focused feeding across garden, houseplant, and greenhouse collections. Its stated aims include fuller leaves, improved color, and plant vigor, so it fits broad canopy care rather than a citrus-specific nutrient correction plan.

The liquid formula is described as fast-absorbing foliar nutrition, allowing growers to apply nutrients directly to leaves instead of relying only on root feeding. Its indoor and outdoor suitability includes garden plants, houseplants, and greenhouse growing, which may help simplify a mixed-plant routine. The listing does not identify citrus specifically or supply nutrient percentages, dilution directions, or a schedule in the provided facts, so citrus growers should assess the label before making it their dedicated tree treatment.

Skip it if you want a spray explicitly listed for citrus trees; TPS NUTRIENTS Citrus Tree Fertilizer Spray names lemon, lime, and orange trees.

This fits growers seeking a general foliar product for mixed indoor, outdoor, or greenhouse plants, especially where canopy care is the priority. Citrus-specific suitability and a nutrient analysis are not stated in the supplied details.

Listed on Amazon as: Canopy Boost Foliar Spray – Liquid Plant Food for Faster Nutrient Uptake, Fuller Canopy Growth & Greener Leaves, 32 oz

#9

9. Southern Ag Nutritional Spray

• Form: Spray
• Weight: 1.4 lb

Best for: Palm and ornamental deficiency spray.

Why it ranks #9: Its stated purpose is correcting palm yellowing and frizzletop; the listing mentions ornamental plants but does not identify citrus.

Palm yellowing and frizzletop are the named targets of Southern Ag Nutritional Spray, making this a specialized choice rather than a citrus-first foliar feed. Its concentrated formula mixes at one to two tablespoons per gallon and is also listed for most ornamental plants, broadening its role beyond palms.

The directions call for mixing one to two tablespoons per gallon of water and spraying directly onto leaves; for palms, they additionally specify spraying into the heart. The product description says its four important nutrients help prevent deficiencies associated with yellowing, browning, curling, and permanent injury in palms and most ornamental plants. That palm-focused application guidance offers a defined workflow, but the supplied facts do not list citrus as an intended plant, so citrus growers should not assume it is a citrus treatment.

Skip it if you want a product explicitly listed for citrus; GARDENWISE Organic Marina Mist is presented for citrus and fruiting trees.

This is a better fit for palm owners addressing yellowing or frizzletop, and for growers treating listed ornamentals. Citrus shoppers should choose a product that names citrus, since this listing's stated focus is elsewhere.

Listed on Amazon as: Southern Ag Nutritional Spray Foliar Nutrient Solution 16 oz.