Using baking soda in spray form helps prevent or manage plant diseases, including black spot and powdery mildew Here's what you'll need 1 1/2 tablespoons (22.5 g) baking soda 1 tablespoon (15 ml) vegetable oil 1 1/2 gallons (5.68 L), plus 1 cup (236 ml) warm water Combine the baking soda and oil in 1 cup (236 ml) of warm water. Stir until the baking soda is dissolved. Add the baking soda mixture to the 1 1/2 gallons (5.68 L) of warm water and stir until blended. Pour into sprayer; use immediately. It worked for my roses and tomatoe plant, so I hope it will work for you! Later days!
