Organic Removal of Powdery Mildew. One powdery mildew organic remedy is to use dilute solutions of hydrogen peroxide (9 parts … The fungal spores overwinter on plant debris, so clean up the beds in fall. It may be best to start over with new plants and soil. If left untreated, it can turn more severe, causing leaves to turn yellow or brown. So using a homemade cure for powdery mildew on the hardier plants isn’t necessary. One powdery mildew homemade prevention tactic is to simply prune back any dead plant material during the normal pruning time. Do not plant things too close together in order to allow ample air circulation around the plants. Try baking soda with vegetable oil and dish soap in water. It starts out as small, white, round, powdery spots on the top sides of older leaves, but quickly covers whole leaves (top and bottom) and stems. Baking soda is a classic organic fungicidal ingredient. Another thing to remember is that if one type of plant gets it, that particular strain of powdery mildew won’t transfer to the other types of plants. Store your herbs for flavor over the long winter months. Though the weather across much of the country may indicate otherwise, spring is on the horizon. In severe cases the leaves turn brown and die. Mix 1 tablespoon (14 g) of baking soda with 1 US tbsp (15 mL) of vegetable oil and 1 tsp (4.9 mL) of dish soap into 1 US gal (3.8 L) of water. A white or gray powder coats the surface of the plant. For… Example first frost date on April 08. If you notice it on a few leaves, remove them from the plant and do not compost them (which can still allow the spores to spread). Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. Alex tesfaye on June 10, 2018: Powdery Mildew is most problematic in shady, humid, areas with poor air circulation, so give your plants good air circulation (provide support for climbing varieties is important). First Frost Date (FFD) refers to the approximate date of the first killing frost of winter. There are even some plants, such as the lilac, that can have the powdery mildew on it and it doesn’t hurt the plant that much. Remove infected leaves to reduce the spread. Sign up to get all the latest gardening tips! If left untreated, the plant will likely succumb to the disease. When prevention fails, it is a good idea to try organic removal of powdery mildew first. Many people look to a homemade cure for powdery mildew before turning to fungicides. Tricia shares tips for planting your very own herb garden in containers. Powdery mildew is a common fungal infection that targets the leaves of sage and other plants. One powdery mildew organic remedy is to use dilute solutions of hydrogen peroxide (9 parts water to 1 part hydrogen peroxide). It is important to not plant in damp, shady areas, as that is a prime location for powdery mildew. Sign up for our newsletter. Some cucurbit varieties are resistant (marked PM). To start, use plant clippers to remove or cut back the portions of your plants that have visible powdery mildew on them. That means its time to at least start thinking about what to plant in your garden this year and which types of diseases your plants may be susceptible to. Be sure to start with healthy plants. For it to be effective on plants, it needs an oil and a detergent to help it stick to leaves. Also, if possible, water the plant from the bottom by filling the saucer with water. It is most often found in mid to late summer and unlike most fungi it doesn’t need a lot of moisture. It starts out as small, white, round, powdery spots on the top sides of older leaves, but quickly covers whole leaves (top and bottom) and stems. When powdery mildew arrives on garden sage, what can be done? There are a few options to try when trying a homemade cure for powdery mildew. It can affect almost any type of plant; appearing on leaves, flowers, fruits, and vegetables. Remove infected leaves to reduce the spread. If you find powdery mildew on your plants, its not necessarily fatal, but you dont want it hanging around. As to the entire plant dying, it could be the result of a very bad case of powdery mildew or many other causes.