ZeroTol HC activated hydrogen peroxide plant fungicide — One Gallon, kills mold & mildew on contact, safe to use to harvest day

ZeroTol HC is an activated hydrogen peroxide spray that kills mold, mildew and many plant diseases on contact and is safe to use on fruits, vegetables and ornamentals up to the day of harvest.

Designed for home gardeners, hobby growers and small-scale producers, ZeroTol HC brings a concentrated, fast-acting oxidizing formula derived from activated hydrogen peroxide. The product works by breaking down pathogen cell walls through oxidation rather than relying on copper or persistent chemicals, leaving no harmful residue and remaining biodegradable. EPA-approved and formulated to be bee-friendly, this one-gallon container supplies enough solution for repeated treatments across greenhouse sections, raised beds and landscape plantings.

How quickly does ZeroTol HC stop mold and mildew?

ZeroTol HC acts on contact: when applied to affected surfaces, the active oxidizer disrupts spores and organism structures immediately, reducing visible mold growth and spore viability. Results are visible faster than many contact-only products because oxidation degrades the pathogen rather than suppressing symptoms.

• Immediate oxidation of spores and surface pathogens
• Visible reduction in mold within hours of treatment
• Works best with thorough coverage and repeat applications as needed

Can I use ZeroTol HC on edible plants and at harvest?

Yes—ZeroTol HC is formulated for use up to and including the day of harvest when used according to label directions. Its activated hydrogen peroxide chemistry breaks down into water and oxygen, which avoids persistent residues on fruits, vegetables and herbs.

• Safe for fruit, vegetables and herbs when applied per instructions
• No long-lasting residues compared with copper-based options
• Easily rinses off where washing is desired before consumption

Is ZeroTol HC safe for beneficial insects and plants?

ZeroTol HC is formulated to be bee-friendly and is less likely to build up in the environment than many traditional fungicides. While gentle on bees when used responsibly, avoid spraying open flowers and apply when pollinators are not active to minimize exposure.

• EPA-approved formulation with bee-friendly profile
• Avoid direct spray on pollinators and open blooms
• Non-persistent chemistry reduces environmental buildup

How should I apply ZeroTol HC for best results?

Apply ZeroTol HC as a foliar spray, drenches where appropriate, or surface treatment depending on the crop and the label directions. Ensure full coverage of affected areas and repeat treatments at intervals advised on the product label to control re-infestation and lingering spores.

• Use a sprayer that delivers even, complete coverage
• Follow label rates for dilution and application frequency
• Reapply after heavy rain or irrigation if surfaces are washed off

Who this product is for: ZeroTol HC is aimed at home gardeners, greenhouse operators, nursery managers and small-scale growers who need a fast, residue-light solution to control mold, mildew and surface plant diseases. If you want a biodegradable, non-copper option that works on contact and can be used on edibles up to harvest, this one-gallon size supplies multiple applications across beds, containers and greenhouse benches.

Features:

• Kills mold spores before they develop into larger problems
• Contains no copper or harsh, persistent chemicals
• Leaves no harmful residue; breaks down quickly
• Effective on contact against many plant diseases
• Biodegradable and formulated for sustainability