Best Fungicide For Palm Trees: 10 Products Compared

#1 · Best Overall

1. Quest Reliant Systemic Fungicide

• Form: Liquid

Best for: Systemic landscape ornamental care.

Why it ranks #1: It lists Phytophthora, root rots, blights, and ornamental landscape use, with foliage and root absorption; palm-specific labeling still needs verification.

Quest Reliant is described as a systemic fungicide absorbed through foliage and roots, then distributed throughout the plant, enabling internal movement rather than surface-only treatment. It also activates the plant’s natural defense mechanisms, and its listed disease targets include Phytophthora, root rots, blights, mildews, and leaf spots.

Systemic distribution through both foliage and roots connects the application route with the product’s stated internal plant coverage, while activation of natural defenses provides a second described mode of action. Its listed settings include agricultural, nursery, greenhouse, and landscape ornamental use, potentially fitting several plant-care contexts. The concentrated liquid is described as easily mixing with water, which supports preparation for application. Although the disease list includes root rots and Phytophthora, the supplied information does not specifically name palms or give palm-specific directions.

Skip it if you need a supplied claim specifically naming palm trees; Bonide Captain Jack's Copper Fungicide 32 oz also lacks palm-specific wording, so verify a palm label first.

This is a candidate for buyers seeking systemic disease control in listed landscape or nursery settings, especially for its named disease targets. Palm-specific directions are not supplied, so confirm the product label before choosing it for palms.

Listed on Amazon as: Quest Reliant Systemic Fungicide 32oz/1 Quart

#2 · Best Ornamental Copper

2. Monterey Liqui-Cop

• Weight: 1.24 kg

Best for: Dormant and growing-season coverage.

Why it ranks #2: Its listed uses include ornamentals, and its disease targets include anthracnose, blight, downy mildew, and leaf spot.

Monterey Liqui-Cop is listed for use during both dormant and growing seasons, giving buyers a stated option across two stages of the plant-care calendar. Its disease list includes anthracnose, brown rot, blight, downy mildew, botrytis blight, and leaf spot, with use identified for fruit trees, nut crops, vegetables, and ornamentals.

The dormant-and-growing-season positioning gives this fungicidal spray a stated role across seasonal care, rather than limiting its description to one growth stage. Monterey also lists fruit trees, nut crops, vegetables, and ornamentals, which can help mixed-garden owners assess whether their planting falls within the stated categories. The 32-ounce title includes a measuring spoon, supporting measured preparation, while the disease-control list names several common problems. The supplied information does not specifically identify palm trees or a palm disease.

Skip it if you want a product whose supplied description names palm trees; Quest Reliant Systemic Fungicide lists landscape ornamentals but not palms specifically.

Consider Liqui-Cop if your seasonal spray routine covers the listed crops and ornamentals and the named diseases. Palm-specific suitability is not confirmed by the supplied product information.

Listed on Amazon as: Monterey Liqui-Cop Fungicidal Spray, 32 oz with Measuring Spoon

#3 · Best Copper Concentrate

3. Bonide Captain Jack Concentrate

• Form: Liquid
• Weight: 1.3 lb

Best for: Concentrate for repeat garden treatments.

Why it ranks #3: This copper concentrate lists ornamentals and controls diseases including downy mildew, powdery mildew, rust, and black spot.

A concentrated liquid copper formula distinguishes this Bonide Captain Jack product from a ready-to-use spray, enabling buyers to prepare a treatment from concentrate. It is approved for organic gardening and lists control of diseases such as powdery mildew, downy mildew, black spot, peach leaf curl, and rust across several garden plant categories.

The concentrate format supports preparing treatment for application across plant surfaces, while directions specifically call for thorough coverage on the tops and undersides of leaves and repeat applications every 7–10 days as needed. Bonide lists vegetables, roses, fruits, nuts, herbs, ornamentals, and turf among its uses, so it can serve varied garden areas. Organic-gardening approval and use up to harvest day are also stated. Palm trees are not specifically named in the supplied plant-use details.

Skip it if you want a ready-to-use spray with no concentrate preparation; Bonide Captain Jack's Copper Fungicide B000UJVDXY is sold as ready to use.

Choose this concentrate if you want organic-gardening copper treatment for its listed plant types and are comfortable preparing and repeating applications. The supplied details do not establish a palm-specific use.

Listed on Amazon as: Bonide Captain Jack Copper Fungicide 16 oz Concentrated Plant Disease Control Solution for Organic Gardening

#4 · Hose-End Ready

4. Southern Ag Liquid Copper

• Form: Liquid
• Weight: 1.3 lb

Best for: Hose-end sprayer copper option.

Why it ranks #4: Its new formulation works with hose-end sprayers, and the product lists disease control for ornamentals as well as vegetables and fruit crops.

Southern Ag’s listed formulation works well with hose-end sprayers, enabling users to apply liquid copper through that equipment rather than relying on a hand-spray bottle. The product is identified for control of disease on vegetables, ornamentals, fruit and nut crops, plus algae in turfgrass, giving it several stated garden uses.

The hose-end sprayer compatibility is the most useful workflow detail: buyers who already use that application method can work with the listed liquid formulation. Southern Ag identifies control of diseases caused by bacteria and fungi, while its stated uses span vegetables, ornamentals, fruit and nut crops, and turfgrass algae. That breadth may suit mixed plantings, but the supplied information does not name palms or specify a dilution rate, so palm suitability and mixing instructions need to be established from the product directions.

Skip it if you require a listing that explicitly names palm trees; Monterey Copper Fungicide Garden Spray identifies citrus, fruits, vegetables, nuts, and ornamentals instead.

Consider Southern Ag if your garden includes its listed crop types and you apply with a hose-end sprayer. Its supplied details do not confirm palm use, so it is not a verified palm-specific choice.

Listed on Amazon as: Southern Ag – Liquid Copper Fungicide – Fungicide, 16oz

#5

5. Monterey Copper Fungicide Garden Spray

• Form: Powder
• Weight: 2 lb

Best for: Preventative treatment for ornamentals.

Why it ranks #5: It is described for ornamental plants and as a preventative treatment, but the supplied details do not identify specific palm diseases.

Preventative action is this Monterey copper spray’s defining role: it helps protect plants from fungal infections rather than serving as a curative treatment. Its listed targets include diseases affecting citrus, fruits, vegetables, nuts, and ornamental plants, making the stated plant coverage relevant to mixed gardens that include ornamentals.

The preventative positioning matters for scheduling: this product is presented as protection before fungal infection, not a remedy for established disease. Monterey lists citrus, fruit, nut, vegetable, and ornamental plants as use categories, which may suit a varied planting when prevention is the goal. The title identifies a one-quart garden spray with a spoon, while the specifications call its form powder; buyers should follow the supplied package directions for preparation and application rather than assume it is ready to spray.

Skip it if you need a product positioned for curative as well as preventative activity; Atticus Gravex 20EW is described with both properties.

This Monterey option suits growers seeking preventative disease protection across listed ornamentals and food crops. It is not the fit for treating established infections, and the supplied information does not specifically confirm palm-tree use.

Listed on Amazon as: Monterey Copper Fungicide Garden Spray, 1 QT with Spoon

#6

6. Bonide Captain Jack Ready-to-Use

• Form: Spray
• Weight: 16 oz

Best for: Organic garden ready-to-use spray.

Why it ranks #6: The ready-to-use copper spray is listed for a variety of plants and common diseases, though the supplied details do not confirm palm use.

Ready-to-use liquid copper comes in a spray form, so there is no concentrate dilution step before treating garden plants. Bonide lists organic gardening approval and control of common diseases including blight, black spot, and powdery mildew, making it a practical option for growers seeking a direct-application treatment.

The spray directions call for shaking the bottle and thoroughly wetting both the tops and undersides of leaves, a clear routine for covering foliage. Bonide advises starting two weeks before disease normally occurs or when symptoms first appear, then repeating every 7–10 days. Its listed plant uses include fruits, vegetables, nuts, herbs, and flowers, and the organic-gardening approval includes use up to harvest day. Those details support broad garden use, but do not specifically establish a palm-tree label.

Skip it if you need a product whose supplied information specifically names palm trees; Bonide's listed plants and diseases do not confirm that use.

Choose this Bonide spray if you want ready-to-use copper treatment for a mixed organic garden and can follow its repeat-application schedule. Palm-tree use is not specifically confirmed in the supplied product information.

Listed on Amazon as: Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases, for All Plants

#7

7. Atticus Gravex 20EW

• Form: Liquid

Best for: Systemic curative and preventive option.

Why it ranks #7: Its myclobutanil formula is described as both curative and preventive and absorbed by leaves and roots, but no palm or disease list is supplied.

Atticus Gravex 20EW is described as having both curative and preventive properties, enabling it to address disease control while also halting future development. Its supplied facts say it absorbs into plant leaves and roots, offering a systemic approach rather than describing only surface coverage.

The stated absorption through leaves and roots is intended to move the product inside the plant, while its curative and preventive properties cover two disease-management roles. Those features may matter to buyers deciding between treatment after disease appears and protection against future development. The listing identifies a 16-ounce concentrate, so application involves a concentrate rather than a ready-to-use spray. However, the supplied information does not provide a disease list, palm-specific directions, or a dilution rate; consult the product directions for permitted uses and preparation.

Skip it if you need a named disease list and palm-use details; Monterey Liqui-Cop Fungicidal Spray lists specific diseases and ornamental use.

Gravex may suit buyers seeking a concentrate described for both curative and preventive disease control through leaf and root absorption. Its supplied information does not confirm palm use or identify target diseases.

Listed on Amazon as: Atticus Gravex 20EW Fungicide (16oz) – Myclobutanil Concentrate

#8

8. Select Source Propiconazole

• Form: Liquid
• Weight: 1.4 lb

Best for: Turf and ornamental concentrate.

Why it ranks #8: It is labeled for turf and ornamental applications and offers residual control, but the supplied details do not specify palm diseases.

Select Source Propiconazole 14.3 is labeled for both turf and ornamental applications, enabling use across two stated landscape categories. Its listed features include excellent residual control, low use rates, a low-odor formulation, and high tank-mix compatibility, details that can matter when planning repeated or combined applications.

The turf-and-ornamental labeling gives buyers two stated application categories to consider, while excellent residual control is presented as a product feature relevant to ongoing disease management. Low use rates and high tank-mix compatibility may support preparation within an established spray workflow, and the low-odor formulation is another listed handling characteristic. The product is a 16-ounce liquid bottle. The supplied information does not identify target diseases or specifically name palm trees, so palm use should not be assumed from ornamental labeling alone.

Skip it if you need named disease targets and palm-specific information; Monterey Liqui-Cop Fungicidal Spray lists several diseases but does not specifically name palms either.

Select Source may fit buyers seeking a propiconazole concentrate for labeled turf or ornamental applications, especially where tank mixing matters. Ornamental labeling alone does not confirm palm suitability, and no target diseases are supplied here.

Listed on Amazon as: Select Source Propiconazole 14.3 Pint Select Fungicide

#9

9. Atticus Gunner 14.3 MEC

• Form: Liquid
• Weight: 2 lb

Best for: Broad-spectrum lawn and landscape use.

Why it ranks #9: Its propiconazole formula targets more than 20 fungi and is described for lawns and landscapes, but palm suitability is not established here.

Atticus Gunner 14.3 MEC contains 14.3% propiconazole, the listed active ingredient concentration, and is described for broad-spectrum prevention against more than 20 plant fungi. Its microemulsion concentrate formulation is identified as easy to mix and more stable, supporting a mixing-focused workflow for lawn and landscape applications.

The microemulsion concentrate is described as using extremely small particles, with mixing ease and greater product stability as stated benefits; that can help buyers preparing treatment for application. Atticus lists broad-spectrum protection against more than 20 diseases, including brown patch and leaf spot, and describes the formula as low odor. Its product positioning is lawns and landscapes, not a specific palm-tree use, so buyers should verify the label's permitted ornamental applications before using it on palms.

Skip it if you need supplied palm-specific directions; Select Source Propiconazole 14.3 Select is labeled for turf and ornamental applications but also does not name palms.

Gunner suits lawn and landscape buyers seeking a mixable concentrate with broad disease coverage and named targets such as brown patch. Its supplied details do not establish palm-specific use, so check the label for that application.

Listed on Amazon as: Atticus Gunner 14.3 MEC Propiconazole Fungicide (32oz) – Protect Your Lawn

#10

10. Trifecta Crop Control

• Form: Spray

Best for: Multi-purpose plant spray users.

Why it ranks #10: This plant-based spray targets pests and problems such as powdery mildew and botrytis, but its listed focus is pests rather than palm disease control.

Trifecta Crop Control combines pesticide, fungicide, miticide, and insecticide roles in a ready-to-use plant spray, enabling one product to address several listed garden problems. Its plant-based formula is identified for issues including powdery mildew, botrytis, mold, spider mites, aphids, and whiteflies on indoor and outdoor plants.

The ready-to-use format can simplify application because the directions call for using the product with an atomizer, misting system, or spraying apparatus rather than preparing a concentrate. Trifecta describes the formula as biodegradable and suitable for edible crops without chemical residues, while listing both indoor and outdoor plant use. Its stated pest and disease coverage spans multiple kinds of problems, so it may suit growers seeking a multi-purpose spray. The supplied information does not specifically establish palm-tree disease control.

Skip it if you need a product with a supplied palm-specific disease claim; Bonide Captain Jack Copper Fungicide 16 oz Concentrate lists ornamentals but not palms.

This suits growers who want a ready-to-use, multi-purpose spray for its listed indoor or outdoor plants and pest concerns. For palm disease, the supplied details do not confirm a specific palm use.

Listed on Amazon as: Trifecta Crop Control Ready to Use Maximum Strength Natural Pesticide, Fungicide, Miticide, Insecticide, Help Defeat Spider Mites, Powdery Mildew, Botrytis and Mold on Plants 32 OZ Size