10 Best Fungus Gnat Killer Neem Oil of 2025

Tested and Reviewed: Top 10 Fungus Gnat Killer Neem Oil deals with expert ratings from 8.1 to a perfect 10

March 2026 Edition

Editor's Choice

9.7

Bonide

Bonide Captain Jack's Neem Oil, 32 oz Ready-to-Use Spray, Multi-Purpose Fungicide, Insecticide and Miticide for Organic Gardening

Free Shipping

Editor's bottom line:

“This fungus gnat killer neem oil is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

MULTI-PURPOSE BUG KILLER - Bonide Neem Oil is a perfect pest control solution for any garden dealing with mites, flies, mildew, and more. This product is a three-in-one fungicide, miticide, and insecticide.
READY TO USE - This product is conveniently ready to use when it arrives. The spray nozzle makes this product easy to deploy and can even be used up to the day of harvest.
KILLS ALL STAGES OF INSECTS - Bonide's 3-in-1 Neem Oil is great because it kills the egg, larvae, and adult stages of insects while also preventing the fungal attack of plant tissues.
DORMANT SPRAY - In addition to being useful for ridding your garden of insects and other pests, this Neem oil makes a great dormant spray to help protect your plants throughout all seasons.
ORGANIC GARDENING - Derived from the Neem seed, our product is great for use on roses, flowers, vegetables, fruits, herbs, indoor houseplants, trees and shrubs. It's approved for organic gardening.

Show Price

Picked by 397 people today

9.5

BioAdvanced

BioAdvanced Organics Brand Neem Oil, Ready-to-Use, 24 oz

Free Shipping

Main Highlights

INSECT KILLER: BioAdvanced Organics Brand Neem Oil spray controls aphids, whiteflies, spider mites, and other listed pests
DISEASE CONTROL: Protect your plants from Black Spot, Rust, and Powdery Mildew and other listed diseases with our neem oil fungicide
MULTI-USE APPLICATION: Use neem oil for plants on vegetables, fruits, houseplants, and flowers
GARDENING SUPPORT: Our neem oil formula supports gardening needs and works as a great spray for plants
3-IN-1 FORMULA: Features fungicide, insecticide, and miticide in one convenient neem oil plant spray for insects

Show Price

9.5

Bonide

Bonide Captain Jack's Neem Max, 8 oz Concentrated Cold Pressed Neem Oil, Multi-Purpose Insecticide, Fungicide, Miticide and Nematicide for Organic Gardening

Free Shipping

Main Highlights

Protect your oasis with Captain Jacks Neem Max Concentrate; this multipurpose product acts as a 4-in-1 insecticide, fungicide, miticide and nematicide
Captain Jacks Neem Max Concentrate is approved for organic gardening; Cold Pressed Neem Oil is a plant based active ingredient that is effective in preventing and controlling diseases and pests in your garden
Control common garden insects at all stages of life; Neem Max kills eggs, larvae and adult insects to provide complete control; effective against aphids, mites, beetles, caterpillars and more
Prevent and control listed major fungal diseases both indoors and outdoors; Neem Max is designed for use in your home and garden, apply to vegetables, fruits, citrus, nuts, ornamentals and more
This concentrated product arrives ready to mix; to use, shake well and mix with water according to package instructions; apply as a spray or drench to affected plants; for best results, please follow instructions on product label

Show Price

9.2

Bonide

Bonide Captain Jack's Neem Max, 32 oz Ready-to-Use Spray Cold Pressed Neem Oil, Multi-Purpose Insecticide, Fungicide, Miticide and Nematicide for Organic Gardening

Free Shipping

Main Highlights

Protect your oasis with Captain Jacks Neem Max Ready-to-Use Spray; this multipurpose product acts as a 4-in-1 insecticide, fungicide, miticide and nematicide
Captain Jacks Neem Max is approved for organic gardening; Cold Pressed Neem Oil is a plant based active ingredient that is effective in preventing and controlling diseases and pests in your garden
Control common garden insects at all stages of life; Neem Max kills eggs, larvae and adult insects to provide complete control; Effective against aphids, mites, beetles, caterpillars and more
Prevent and control listed major fungal diseases both indoors and outdoors; Neem Max is designed for use in your home and garden, apply to vegetables, fruits, citrus, nuts, ornamentals and more
This product arrives conveniently ready-to-use in a trigger spray bottle. To use, shake well and apply as a spray or drench to affected plants; always read and follow label instructions before use

Show Price

9.0

Smart Grower

Neem Oil Spray for Plants Botanical Blend – Plant Wash with Natural Essential Oils, Simple Ready-to-Use Plant Spray for Gardens, Houseplants, Indoor & Outdoor Plants – 8 oz

Free Shipping

Main Highlights

Premium Neem Oil Plant Wash 8 oz Bottle Infused with neem oil and a natural blend of essential oils (tea tree, clove, sage, thyme, cedarwood, lemongrass, peppermint, garlic, and capsicum)
Gentle Formula for Plant Care Fine essential oil particles cleanse and refresh leaves, helping maintain shine and clarity.
Eco-Friendly & Safe Ingredients Biodegradable, cruelty-free, and plant-based.
Convenient Ready-to-Use Spray 8 oz No mixing required. Simply shake well, spray directly on leaves (top and underside), and wipe for extra shine if desired.
For Indoor & Outdoor Plants Ideal for houseplants, herbs, flowers, vegetables, and outdoor greenery. Use regularly to keep leaves fresh and vibrant.

Show Price

8.8

Smart Grower

Neem Oil Spray for Plants with Peppermint Oil, Natural Plant Wash Made for Indoor and Outdoor Plants Smart Grower 16oz Easy Ready to Use Spray

Free Shipping

Main Highlights

Gentle Plant Wash Made with Neem Oil & Peppermint Oil
Made With Essential Neem Oil for Shiny Plant Leaves
Includes Natural Essential Peppermint Oil for Added Benefit
Natural Use for Indoor and Neem Oil Spray For Outdoor Plants
Safe for the Environment, Plants, Pets, and People When Used as Directed

Show Price

8.6

KATE'S GARDEN

Kate's Garden Plant Spray for Insects & Getting Rid of Gnats. Fungus Gnat Killer & Bug Spray for Indoor Plants (16oz, Pet Safe, Non Toxic)

Free Shipping

Main Highlights

GNAT CONTROL FOR INDOOR PLANTS: Our powerful gnat spray for indoor plants kills fungus gnats, spider mites, and fruit flies; it's the perfect solution for getting rid of fruit fly and fungus gnats
FUNGUS GNAT SPRAY FOR INDOOR PLANTS: This gnat spray is effective for getting rid of gnats in plants; ideal use as an outdoor or indoor plant bug spray for insects to control and eliminate pests
GNAT KILLER INDOOR: Made with natural ingredients in the USA; our spray contains peppermint and rosemary oil, a natural and safe solution that works just as well as neem oil spray for houseplant insect control, indoor plants and outdoor gardens
NON-TOXIC PLANT GNAT TREATMENT: This peppermint oil spray for bugs is safe for use around children and pets when used as directed; it effectively repels flying pests, small mites, and get rid of gnat infestation, keeping your plants and home pest-free
EASY TO USE PLANT BUG SPRAY: Shake the plant spray bottle well before use; test spray on 1-2 leaves and wait 2 hours before spraying the entire plant, avoiding new leaf growth; apply liberally on soil to target pests, eggs, and larvae; for best results, use this gnat killer for indoor plants & outdoor gardens once a week or as needed; this 16oz peppermint spray for plant insects has up to 1,500 sprays; if the sprayer is broken, please contact us for a replacement

Show Price

8.3

BLESS YOUR SOIL

Neem Oil Spray for Plants – Big Leaf Energy, with Essential Oils – Ready-to-Use Plant Spray for Outdoor & Indoor Plants, Made in USA (16 fl oz)

Free Shipping

Main Highlights

NEEM OIL SPRAY FOR PLANTS A fast-acting, multipurpose neem spray designed for indoor plants, houseplants, and garden use. This ready-to-use plant spray combines cold-pressed neem oil with a balanced botanical blend to solve common plant care issues while supporting healthy, resilient leaves.
MULTI-PURPOSE NEEM SPRAY More effective than basic neem oil sprays or peppermint-only formulas. This 4-in-1 leaf spray supports plant resilience, helps maintain leaf cleanliness, enhances natural leaf shine, and fits seamlessly into organic gardening and routine plant care.
READY TO USE NATURAL FORMULA NOTE Use straight from the bottle or dilute up to 4× with water for lighter applications and sensitive plants. Made without synthetic emulsifiers or chemicals, so natural separation or thickening may occur in colder temperatures. Shake well before each use. If needed, gently warm the bottle and flush the spray head with warm water to restore flow.
WHAT TO EXPECT Features an earthy neem base balanced with subtle citrus, woody, and spice notes for a fresh, plant-friendly aroma. Leaves reveal a natural, healthy sheen (not a synthetic high-gloss). Use every 530 days as needed; spray tops and undersides of leaves, avoid direct sun for 6 hours, and always spot test first.
MADE IN USA ORGANIC-MINDED FORMULA Thoughtfully crafted with alcohol-free, chemical-free ingredients. Vegan and cruelty-free. Made in California by a women-owned small business dedicated to smart, effective plant care for indoor plants, houseplants, and gardens.

Show Price

8.1

Kate's Home & Garden

Kate's Home & Garden Plant Spray for Insects & Getting Rid of Gnats with 12 Sticky Traps. Fungus Gnat Killer & Bug Spray for Indoor Plants (16oz, Peppermint, Pet Safe, Non Toxic)

Free Shipping

Main Highlights

GNAT CONTROL FOR INDOOR PLANTS: This bundle includes our natural plant bug spray and 12 gnat sticky traps for plants; this powerful gnat spray for indoor plants kills fungus gnats, spider mites, and fruit flies; use it with our sticky traps for enhanced pest control, ensuring thorough coverage and effective elimination of bugs and pests in your home and garden; it's the perfect solution for getting rid of fruit fly and fungus gnats (please contact us if the traps are missing and we will send a replacement)
GNAT SPRAY FOR INDOOR PLANTS: This gnat spray is effective for getting rid of gnats in plants; ideal use as an outdoor or indoor plant bug spray for insects to control and eliminate pests (please contact us if the traps are missing and we will send a replacement)
FUNGUS GNAT KILLER INDOOR: Made with natural ingredients in the USA; our indoor insect & pest control spray for killing gnats contains peppermint and rosemary oil, a natural and safe solution that works just as well as neem oil spray for houseplant insect control, indoor plants and outdoor gardens
NON-TOXIC PLANT GNAT TREATMENT: This peppermint oil spray for bugs is safe for use around children and pets when used as directed; it effectively repels flying pests, small mites, and get rid of gnat infestation, keeping your plants and home pest-free
EASY TO USE PLANT BUG SPRAY: Shake the plant spray bottle well before use; test spray on 1-2 leaves and wait 6 hours before spraying the entire plant, avoiding new leaf growth; apply liberally on soil to target pests, eggs, and larvae; for best results, use this gnat killer for indoor plants & outdoor gardens once a week or as needed; this 16oz peppermint spray for plant insects has up to 1,500 sprays; if the sprayer is broken or if the traps are missing, please contact us for a replacement

Show Price

Our Best Overall Choice

Best Choice

9.7

Bonide

Bonide Captain Jack's Neem Oil, 32 oz Ready-to-Use Spray, Multi-Purpose Fungicide, Insecticide and Miticide for Organic Gardening

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

MULTI-PURPOSE BUG KILLER - Bonide Neem Oil is a perfect pest control solution for any garden dealing with mites, flies, mildew, and more. This product is a three-in-one fungicide, miticide, and insecticide.
READY TO USE - This product is conveniently ready to use when it arrives. The spray nozzle makes this product easy to deploy and can even be used up to the day of harvest.
KILLS ALL STAGES OF INSECTS - Bonide's 3-in-1 Neem Oil is great because it kills the egg, larvae, and adult stages of insects while also preventing the fungal attack of plant tissues.
DORMANT SPRAY - In addition to being useful for ridding your garden of insects and other pests, this Neem oil makes a great dormant spray to help protect your plants throughout all seasons.
ORGANIC GARDENING - Derived from the Neem seed, our product is great for use on roses, flowers, vegetables, fruits, herbs, indoor houseplants, trees and shrubs. It's approved for organic gardening.

Show Price

Deals are Live

Special Amazon deal ends in: