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Captain Jack's Liquid Copper Fungicide
When powdery mildew, black spot, or downy mildew threaten your garden, this organic-approved copper fungicide has you covered. Made with copper octanoate (copper soap), it controls a wide range of listed plant diseases — including peach leaf curl and rust — while fitting right into an organic growing routine.
Where to use it: vegetables, roses, fruits, nuts, herbs, ornamentals, and turf.
Why Gardeners Reach For It
- Approved for organic gardening
- Works as both a dormant-season and growing-season treatment
- Can be applied up to the day of harvest
- Controls powdery mildew, downy mildew, black spot, rust, peach leaf curl, and more
How to Apply
Mix 0.5 to 2.0 fl. oz. per gallon of water, applying roughly 1.1 to 2.3 gallons of diluted spray per 1,000 sq. ft. Specific rates and reapplication intervals vary by crop — always check the full product label for your particular plants.
Intended for residential use only. Copper sprays can cause sensitivity on some rose varieties and certain grape or apple varieties. If you're treating a variety you're unsure about, test a small area first before spraying the whole plant.
EPA Reg. No. 67702-2-4: This is an EPA-registered pesticide. Read and follow the full label before use. Harmful if swallowed or absorbed through skin. Toxic to fish and aquatic invertebrates — avoid application near water sources. Keep out of reach of children.
Always read and follow the complete label directions and precautionary statements