Best Fungicide Drench For Trees: Compare 10 Options

#1 · Best Overall

1. Reliant Fungicide

• Form: liquid
• Weight: 11 lb

Best for: Multi-method systemic disease control.

Why it ranks #1: Its listing explicitly allows soil drenches and names tree cankers, including Phytophthora ramorum, plus root dip and direct injection applications.

Application flexibility is the central feature of this Reliant fungicide: the listing names soil drench, foliar spray, basal bark spray, drip tape, root dip and direct injection. That range lets tree-care buyers select among several treatment workflows, while the product is cleared for more than 146 plant types and crops.

The soil-drench option directly suits buyers seeking a root-zone treatment, while basal bark spray, irrigation drip tape and direct injection offer other listed ways to apply it. Reliant is cleared for more than 146 plant types and crops, broadening its stated use beyond one tree species. Its disease list includes Phytophthora ramorum associated with sudden oak death, along with Phytophthora and apple scab. This is a one-gallon liquid; consult its label for application specifics.

Skip it if you want a listed one-gallon branded VivaGrow product; Reliant is sold under that brand in the other supplied listings.

Tree managers wanting multiple listed application methods, including soil drench and basal bark spray, may value this Reliant option. Its disease list includes sudden oak death, but the label must guide rates and suitability for the target tree.

Listed on Amazon as: Reliant Fungicide 1gal

#2 · Largest Listed Size

2. VivaGrow Reliant Gallon

• Form: Spray

Best for: Bulk systemic tree-drench concentrate.

Why it ranks #2: The one-gallon systemic concentrate mixes with water for spray or drench application and is absorbed by roots for distribution through plants.

The one-gallon size is the defining advantage of VivaGrow Reliant for buyers treating multiple plants or returning to a tree-care routine. Its concentrated formula mixes with water for foliar spray or drench application, and systemic uptake through roots and foliage carries treatment throughout the plant while activating natural defenses.

This formulation’s water-mixing concentrate supports preparing a drench for root-zone application or a foliar spray when that is the preferred workflow. The listed systemic absorption through both roots and foliage means treatment is distributed through the plant, rather than limited to the application point. Natural defense activation adds a second mode of action, and the product description lists curative and protective activity against many pathogens. The gallon quantity suits repeat or broader use, with label directions governing dilution and precautions.

Skip it if you need a tree-specific dose stated in the listing; Reliant’s supplied details leave dilution to the label.

Choose this gallon concentrate when you need a water-mixed systemic product for tree drenches and foliar applications across multiple plants. Its quantity suits repeat use, while label directions remain essential for dilution and safe application.

Listed on Amazon as: Reliant Systemic Fungicide 1 Gallon

#3 · Smaller Systemic Size

3. VivaGrow Reliant Quart

• Form: Liquid

Best for: Systemic concentrate for tree disease.

Why it ranks #3: This quart-size systemic liquid is absorbed by roots and lists control of Phytophthora, root rots, blights, and other plant diseases.

Systemic absorption through both foliage and roots is the key feature of VivaGrow Quest Reliant: it lets the concentrated liquid move throughout a treated plant rather than remaining only on sprayed surfaces. Its listed disease targets include Phytophthora, root rots, blights, scabs, cankers and leaf spots, making it relevant to a range of tree disease concerns.

Reliant’s foliage-and-root uptake supports use where disease management needs more than surface coverage, while its systemic distribution carries the treatment throughout the plant. The product is also described as activating natural plant defenses, pairing direct disease control with a plant response. Its listed targets include Phytophthora and apple scab as well as cankers and bacterial diseases. The 32-ounce liquid is concentrated and mixes with water, though the supplied details do not specify a tree-specific mixing rate.

Skip it if you need a stated tree drench rate before choosing; the product details do not provide one.

Tree owners seeking a systemic liquid for listed diseases such as Phytophthora, cankers or apple scab can consider this concentrate. Its foliage-and-root uptake is relevant, but use depends on following the product label for tree application.

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

#4 · Listed for Trees

4. Ferti-lome Fungicide 5

• Form: Oil
• Weight: 16 oz

Best for: Indoor and outdoor concentrate for trees.

Why it ranks #4: The concentrate is listed for indoor and outdoor use on trees, shrubs, and nuts, though the supplied details do not specify drench application.

Ferti-lome Fungicide 5 explicitly lists trees alongside shrubs, nuts, lawns, tropicals and indoor plants, giving it an unusually broad stated setting for a garden concentrate. It is also OMRI listed for organic gardening, a useful distinction for buyers seeking one product across indoor and outdoor plant care.

The indoor-and-outdoor listing allows buyers to consider the concentrate across trees and other plantings, including vegetable gardens and flower beds. Its disease and bacteria control covers listed blights, molds, rots, spots, specks and mildews, although the listing directs buyers to the label for complete prevention and treatment lists. Concentrate is one of the stated formats, alongside ready-to-spray and ready-to-use versions. The supplied details do not identify a tree-drench method or rates.

Skip it if you need listed root-zone drench instructions; Ferti-lome’s supplied details identify tree use but not that application method.

Ferti-lome is worth considering for buyers seeking an organic-listed disease product across indoor and outdoor plants, including trees. The supplied facts support broad setting and disease categories, but do not establish a specific tree-drench workflow.

Listed on Amazon as: Fertilome (16112) Fungicide 5 Concentrate, Plant Disease and Bac, 16 oz

#5 · Root Absorption

5. Atticus Gravex 20EW

• Form: Liquid

Best for: Curative and preventive leaf-root treatment.

Why it ranks #5: Its verified details say it absorbs into plant leaves and roots and offers curative and preventive properties, but tree drenching is not specified.

Atticus Gravex 20EW pairs curative and preventive disease control, giving buyers a product described as addressing existing disease while halting future development. Its myclobutanil concentrate absorbs into both plant leaves and roots, a feature relevant to tree owners weighing treatment beyond surface contact alone.

The stated curative and preventive properties give Gravex a dual role: it is described as fighting disease and halting future development. Absorption into leaves and roots supports treatment from inside the plant, which may suit buyers considering both canopy and root uptake. The supplied listing identifies a 16-ounce liquid concentrate but gives no tree-drench directions or disease list. That makes label guidance especially important when deciding whether its application method fits a particular tree-care need.

Skip it if you need a listing that explicitly names soil drenching and tree diseases; the supplied Gravex details do not.

Consider Gravex if curative and preventive properties plus leaf-and-root absorption match your disease-care priorities. For tree drench use, first check the product label: the supplied information does not identify a drench method or specific tree targets.

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

#6

6. Bonide Revitalize Biofungicide

• Form: Spray
• Weight: 1.3 lb

Best for: Organic garden disease prevention.

Why it ranks #6: This concentrate triggers a plant immune response and lists blight, anthracnose, and powdery mildew control, but its supplied use details emphasize spray.

Bonide Revitalize is distinguished by its beneficial Bacillus amyloliquefaciens strain, which triggers a plant immune response to control and prevent listed diseases. Its organic-gardening approval and stated use up to harvest can matter to growers managing edible plants alongside ornamentals, though the supplied information does not specify tree-drench directions.

The immune-response approach and named beneficial bacterial strain give this biofungicide a different role from products described as systemic concentrates. The listing names blight, anthracnose, powdery mildew and black spot among its disease targets, supporting consideration for mixed garden plantings. Organic-gardening approval and use up to harvest are relevant when edible crops are part of the routine. It is a 16-ounce concentrate in spray form; tree-specific drench instructions are not included in the supplied details.

Skip it if you require an explicitly listed soil drench for trees; Revitalize’s supplied details describe a spray concentrate instead.

Gardeners combining edible crops and ornamentals may appreciate Revitalize’s organic-gardening approval, harvest timing and named disease targets. It is a less direct fit when the priority is a tree drench, since that method is not stated here.

Listed on Amazon as: Bonide Revitalize Biofungicide, 16 oz Concentrate Disease Control for Organic Gardening, Controls Blight & Mold

#7

7. Select Source Propiconazole

• Form: Liquid
• Weight: 1.4 lb

Best for: Turf and ornamental residual concentrate.

Why it ranks #7: It is labeled for turf and ornamental applications and offers residual control, but the supplied details do not identify tree drench use.

Select Source Propiconazole 14.3 lists excellent residual control and low use rates, features that can appeal to buyers seeking lasting coverage with limited product use. Its label scope includes both turf and ornamental applications, but the supplied information does not state a tree-specific drench method or disease list.

The residual-control claim suggests a role where persistence is a consideration, while the listed low use rates may affect how buyers plan mixing and application; label directions remain essential. High tank-mix compatibility is another stated feature that can fit a workflow involving compatible products. The product is a liquid in a 16-ounce bottle and is labeled for turf and ornamentals. Since no tree-drench directions or target diseases are supplied, confirm that the label matches the intended tree application.

Skip it if you need an expressly listed tree drench and disease targets; this listing only specifies turf and ornamental applications.

Consider Select Source when residual control, low use rates and tank-mix compatibility matter for a labeled turf or ornamental application. For tree drenching, the supplied facts do not establish the method or target disease, so label fit is decisive.

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

#8

8. Bonide Captain Jack Copper

• Form: Liquid
• Weight: 1.3 lb

Best for: Organic copper spray for listed diseases.

Why it ranks #8: The copper concentrate lists disease control for fruits, nuts, and ornamentals, but directions specify thorough application to plant surfaces rather than a drench.

Bonide Captain Jack Copper Fungicide is approved for organic gardening and can be used up to the day of harvest, making it relevant to growers treating edible plants. Its liquid copper concentrate lists diseases including powdery mildew, downy mildew, black spot, peach leaf curl and rust.

The listed use across vegetables, roses, fruits, nuts, herbs, ornamentals and turf gives this copper concentrate broad garden relevance. Application directions call for thorough coverage of leaf tops, undersides and plant surfaces, with repeat applications every 7–10 days as needed. That surface-coverage routine is a different workflow from a root-zone drench, so tree buyers should check whether the labeled application suits their target. Organic-gardening approval and harvest-day use are useful considerations for edible plantings.

Skip it if you need a systemic root-zone treatment; VivaGrow Reliant 1 Gallon lists both drench use and systemic uptake.

This copper concentrate suits growers treating listed garden plants with thorough surface coverage, especially where organic-gardening approval and harvest timing matter. Tree owners seeking a root drench should note that the supplied directions focus on plant surfaces.

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

#9

9. Monterey Fungi-Max

• Form: Liquid

Best for: Minimal-detail liquid fungicide option.

Why it ranks #9: The supplied details identify a 16-ounce liquid fungicide, but provide no tree, disease, or drench-use information to support this specific choice.

Monterey Fungi-Max is identified as a liquid fungicide and includes a measuring spoon, giving buyers a named tool for measuring product during preparation. Beyond those details, the supplied listing provides no disease targets, application methods, plant types or concentration information to evaluate for tree drenching.

The liquid form and included measuring spoon are the only specific product facts supplied, so the spoon may support measurement during preparation but does not establish a dilution rate. No tree species, drench direction, disease list or organic-use claim is provided in the available information. Buyers comparing options for trees should therefore treat this listing as underspecified for that use and consult the product label before deciding whether its application and target fit their needs.

Skip it if you need confirmed tree-drench directions and disease targets; this listing supplies neither in the available details.

This may suit a buyer who already has the Monterey Fungi-Max label and needs its liquid product with a measuring spoon. For tree-drench selection, the supplied listing lacks the application and disease information needed to assess fit.

Listed on Amazon as: Monterey Fungi-Max Fungicide, 16 oz with Measuring Spoon

#10

10. Southern Ag Captan

• Form: Powder
• Weight: 8 oz

Best for: Captan powder for fruit and ornamentals.

Why it ranks #10: This wettable powder lists Botrytis control and uses on some fruits and ornamentals, but no tree drench application is stated.

Southern Ag Captan is a wettable powder listed for Botrytis rot, or grey mold, on strawberries, with additional labeled uses across many fruits, ornamentals and lawns. That named disease target and crop range make it relevant to some garden disease decisions, but the supplied details do not identify tree-drench use.

The 50% wettable powder format distinguishes Captan from ready-to-apply liquids and means buyers should consult the label for preparation and application directions. Its listed fruit crops include apples, almonds, apricots, blueberries, cherries, grapes, nectarines, peaches, plums and strawberries, while the product is also labeled for ornamentals and lawns. Botrytis rot on strawberries is the specifically named control claim. No tree drench method is stated in the supplied information.

Skip it if you need a systemic tree drench; VivaGrow Reliant 1 Gallon explicitly lists drench application and systemic distribution.

Fruit growers dealing with listed crops and Botrytis rot on strawberries may find the labeled scope relevant. Tree owners should not assume this powder is a drench option; the supplied facts do not state that method.

Listed on Amazon as: Southern Ag – 01600 – Captan Fungicide – 8oz, White Bottle