---
product_id: 2343720
title: "Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases"
brand: "bonide"
price: "€ 20.50"
currency: EUR
in_stock: true
reviews_count: 8
category: "Bonide"
url: https://www.desertcart.ie/products/2343720-bonide-captain-jacks-copper-fungicide-32-oz-ready-to-use
store_origin: IE
region: Ireland
---

# organic gardening approved 32 oz ready-to-use spray broad-spectrum disease control Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases

**Brand:** bonide
**Price:** € 20.50
**Availability:** ✅ In Stock

## Summary

> 🌱 Protect your garden like a pro—because your plants deserve Captain Jack’s copper shield!

## Quick Answers

- **What is this?** Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases by bonide
- **How much does it cost?** € 20.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/2343720-bonide-captain-jacks-copper-fungicide-32-oz-ready-to-use)

## Best For

- bonide enthusiasts

## Why This Product

- Trusted bonide brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Organic & Safe:** Certified for organic produce, use up to harvest day with confidence
- • **Versatile Plant Care:** Perfect for fruits, vegetables, herbs, ornamentals & flowers alike
- • **Comprehensive Defense:** Targets blight, powdery mildew, leaf spots & more for healthier plants
- • **Effortless Application:** Ready-to-use trigger spray for quick, no-fuss garden protection
- • **Weather-Resistant Shield:** Rainproof once dry, ensuring long-lasting fungal protection

## Overview

Bonide Captain Jack's Copper Fungicide is a 32 oz ready-to-use spray designed for organic gardeners seeking effective, broad-spectrum fungal disease control. Approved for use on fruits, vegetables, herbs, and ornamentals, it combats common diseases such as blight, powdery mildew, and leaf spots. Its rainproof formula provides lasting protection and can be safely applied up to the day of harvest, making it an essential tool for maintaining vibrant, healthy plants throughout the growing season.

## Description

Control common plant diseases in your lawn and home garden with Captain Jack’s Ready-to-Use Liquid Copper Fungicide. Approved for organic gardening, Copper Fungicide can be used on a variety of listed plants including fruits, vegetables, nuts, herbs and flowers, and can even be applied up to the day of harvest. Captain Jack’s Copper Fungicide is effective against common fungal diseases including downy mildew, black rot, leaf spot, powdery mildew, blight, peach leaf curl and more. This product arrives conveniently ready-to-use in a trigger spray bottle. For best results, shake well and apply thoroughly to the tops and undersides of leaves and all plant surfaces on affected plants. Repeat every 7-10 days as needed. Please see product label for full use instructions.

Review: Bonide Captain Jack's Copper Fungicide: Your Go-To Solution for Healthy, Disease-Free Plants - Bonide Captain Jack's Copper Fungicide is a top-notch solution for protecting your plants from a wide range of fungal diseases. This ready-to-use formula is ideal for both organic gardeners and those looking for an effective, environmentally friendly way to manage issues like powdery mildew, downy mildew, blight, and leaf spots. What sets Captain Jack's Copper Fungicide apart is its versatility; it can be used on a variety of plants, including vegetables, fruits, ornamentals, and flowers. The active ingredient, copper octanoate, is a naturally occurring compound that acts as a protective barrier, preventing fungal spores from taking hold on plant surfaces. Gardeners love the ease of application—simply spray it on the affected areas and let it work its magic. The product is rainproof once dry, ensuring lasting protection even in unpredictable weather. Many users have reported seeing a significant reduction in fungal issues after just a few applications, with healthier, more vibrant plants as a result. Bonide Captain Jack's Copper Fungicide is an essential addition to any gardener's toolkit, providing peace of mind and reliable disease control that helps keep plants thriving throughout the growing season.
Review: The best - Worked great

## Features

- Control fungus and disease in your garden with Captain Jack’s ready-to-use Liquid Copper Fungicide!
- Approved for organic gardening, this fungicide is suitable for the production of organic produce and can even be used up until the day of harvest!
- Copper Fungicide effective in the control and prevention of a wide range of plant diseases. Listed common garden diseases include blight, black spot, powdery mildew peach leaf curl and more.
- Apply copper fungicide to fruits, vegetables, ornamentals and other plants in your lawn and garden for complete and long-lasting disease control.
- This product arrives conveniently ready-to-use in a trigger spray bottle! To use, shake well and thoroughly apply to affected plants and foliage. Please see product label for full use instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000UJVDXY |
| Active Ingredients | copper |
| Best Sellers Rank | #200 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #30 in Soils, Mulches & Planting Media |
| Brand | Bonide |
| Customer Reviews | 4.5 4.5 out of 5 stars (7,576) |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00037321007753, 00617407747232 |
| Is Discontinued By Manufacturer | No |
| Item Form | Spray |
| Item Weight | 1 pounds |
| Item model number | 7756A |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | Bonide |
| Product Dimensions | 2.5 x 4.88 x 11.88 inches |
| Special Feature | Breathable |
| Target Species | Dog |
| UPC | 617407747232 037321007753 |

## Product Details

- **Active Ingredients:** copper
- **Brand:** Bonide
- **Item Form:** Spray
- **Item Weight:** 1 Pounds
- **Liquid Volume:** 32 Fluid Ounces

## Images

![Bonide Captain Jack's Copper Fungicide, 32 oz Ready-to-Use Spray for Organic Gardening, Controls Common Diseases - Image 1](https://m.media-amazon.com/images/I/71jTX3FFw4L.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: The directions say to spray both sides of the leaves. Does that mean you can't just spray it, but have to search out every leaf to get both sides?**
A: I didn't intentionally spray the backs of the leaves. I got fruit from the plants, I think just as much as I got the year before, on plants I didn't have to spray.

**Q: Does this kill or harm insects/pollinators or does it just kill the fungus?**
A: We have not seen negative results concerning bees or other pollinators. It does not kill any bugs, good or bad, that we have seen.  You must start spraying this as soon as your plants are established or as soon as you see first signs of fungus. My husband has very pleased with the results after using every week during the growing season. Wish it could help with this unbearable heat!

**Q: Where can I see the list of plants this works on before I decide to buy it?**
A: Google the product and go to there page scroll to bottom and clip contact us and ask for list of plants.

**Q: This won't harm veggies themselves right?**
A: I FORGOT TO SAY IT DOESN'T HARM THE VEGGIES :)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bonide Captain Jack's Copper Fungicide: Your Go-To Solution for Healthy, Disease-Free Plants
*by V***. on August 26, 2024*

Bonide Captain Jack's Copper Fungicide is a top-notch solution for protecting your plants from a wide range of fungal diseases. This ready-to-use formula is ideal for both organic gardeners and those looking for an effective, environmentally friendly way to manage issues like powdery mildew, downy mildew, blight, and leaf spots. What sets Captain Jack's Copper Fungicide apart is its versatility; it can be used on a variety of plants, including vegetables, fruits, ornamentals, and flowers. The active ingredient, copper octanoate, is a naturally occurring compound that acts as a protective barrier, preventing fungal spores from taking hold on plant surfaces. Gardeners love the ease of application—simply spray it on the affected areas and let it work its magic. The product is rainproof once dry, ensuring lasting protection even in unpredictable weather. Many users have reported seeing a significant reduction in fungal issues after just a few applications, with healthier, more vibrant plants as a result. Bonide Captain Jack's Copper Fungicide is an essential addition to any gardener's toolkit, providing peace of mind and reliable disease control that helps keep plants thriving throughout the growing season.

### ⭐⭐⭐⭐⭐ The best
*by S***E on February 13, 2026*

Worked great

### ⭐⭐⭐⭐ Some improvement with powdery mildew
*by C***N on June 9, 2024*

This worked somewhat on my miniature rose’s bad case of powdery mildew. But ultimately what really helped it was cutting it down by a third, thereby removing a lot of the infected foliage. Fortunately the foliage has since grown back and it is starting to do better. I think this product does work on powdery mildew. For the spots it touched were clear of mildew in a few days. But unfortunately I gave my rose too much water and forgot to empty the tray under it. So it looks a little washed out right now. But since I corrected that it is getting greener again. So pay no attention to the paleness of my rose in the photos. But if you have a little powdery mildew on your rose, maybe consider this product. But if you have a bad case of it on your rose, maybe consider just cutting off the afflicted parts or trimming it down by 1/3. Might be more prudent in the case of a bad powdery mildew infection. Plus roses hate herbicide and pesticides. So you should use this fungicide only a little bit and as little as possible too. Using this product too much can make your roses sick or kill them. So remember only to use a little bit of it for your roses. And avoid herbicide and pesticides altogether whenever possible. And if you must use herbicide and pesticides make absolutely sure that they are ROSE SAFE. Update- while this case treat fungus like powdery mildew, I would not recommend it for any fungus other than what it is meant to treat. Copper fungicide is quite potent and usually only used as a last resort. I would suggest something else for edible food. Look into vinegar spray. Maybe it would help with edible food. Also I wound up having to mostly defoliate my rose. That saved it, I believe. It is now doing much better.

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---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-06*