Ed Rosenthal's Zero Tolerance

Natural Pest Defence.

Originally developed by renowned botanist Ed Rosenthal, Zero Tolerance is an Australian-available, plant-based pest and fungus control spray trusted by organic growers worldwide. Made from food-grade essential oils, cinnamon, clove, rosemary, and thyme, it eliminates and repels common pests like mites, aphids, thrips, fungus gnats, and scale, without harmful chemicals or lingering residues.

This ready-to-use and concentrate formulation is OMRI-listed and safe to use up to five days before harvest, making it ideal for growers who want effective pest management right through to flowering. Unlike neem or pyrethrum, it evaporates cleanly and is safe around people, pets, and beneficial insects.

At Hydro Oasis, we stock Zero Tolerance for its organic credentials, user-friendly application, and reliable protection. If you're after a no-residue solution for pest and fungus control, Zero Tolerance offers peace of mind with every spray, naturally.