By itself it is not dangerous, in fact letting an iron nail become 'rusty' in lemon juice overnight was used by health relief staff as a field-treatment in areas of anemia and malnutrition. The American Society for the Prevention of Cruelty to Animals warns that the only species of mint, in the genus Mentha, that is toxic to dogs is English pennyroyal (Mentha pulegium). With the new zinc pennies, there is the potential for zinc toxicosis, which can be fatal. Toxicity of Mint . Plants grow well in them, and they save a lot of bending over in the garden. A grating of mint is introduced sometimes into a potato salad, or into a fowl stuffing, and in Wales it is not unusual to boil mint with cabbage. If you have it, it will be in the soil as well as the plants. The fungus causes dusty orange, yellow and black spots on leaves, and distortion of shoots. Rust is simply an oxide of iron (Fe2O3). Its formulation would act gently on the material it is working on and also on the human skin and this product is considered to be an environmentally safe product. It may be made by steeping mint leaves in apple jelly, or in one of the various kinds of commercial gelatine. The only problem when … In fact, mint rust is so severe that in the past I've had to rip out my mint every year and replant it from scratch in sterile soil and containers. grows tenaciously, but even this tough plant, which grows in U.S. Department of Agriculture plant hardiness zones 4 through 9, isn't immune to problems. Rust is oxidation. Just don't place them in the same spot or potting soil because that increases the chances that the disease will spread to the replacement plants as well. I've tried copper-based fungicides, but (a) they don't work very well and (b) they're toxic so not good for a culinary herb like mint. We have oxidation going on in our own bodies, explaining why there is so much advertising for antioxidant foods and pills. Mint rust is a common fungal disease of garden mint, but also affects marjoram and savory. At onset you can trim infected leaves and use a fungicide, but once it gets a good start, trimming and/or use of fungicides won't control it. Mint Jelly can be used instead of mint sauce, in the same manner as red currant jelly. The bigger issue is controlling the disease in the plants. Now let’s get down to the nitty gritty of getting rid of rust on metal. Mint or mentha belongs to the Lamiaceae family, which contains around 15 to 20 plant species, including peppermint and spearmint. Mint can suffer from several plant diseases such as verticillium wilt, mint rust, mint anthracnose. Slow oxidation is revealed in such ways as rust on metal. Rapid oxidation is fire. As an edible herb, it is non-toxic to humans. When mint starts growing black spots on its leaves, your plants are likely suffering from leaf blight or advanced stages of mint rust. I would cite just the toxicity of the zinc used in coins as a potential hazard: [h=2]Poisoning[/h] In 1982, the United States Mint began minting pennies coated in copper but made primarily of zinc. However, according to the ASPCA, the essential oils in mint are toxic to dogs, cats, and horses. If a lot is ingested, it can cause vomiting and diarrhea. It is a popular herb that … As … A: Galvanized troughs make excellent gardening containers. If these strike, the best thing to do is get rid of your mint plants and get new, healthy ones. Mint rust. The Evapo-Rust rust remover holds the number one spot and this is the type of rust remover that isn’t just non-toxic but also one customer would find very easy to use. Mint (Mentha spp.) ... Mint can sometimes get rust, which appears as small orange spots on the undersides of leaves. 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