Gallon of water, 1 chopped onion add to gal of water. let it sit under the sun for 3days and spray it over your veg plants, n flowers to keep bugs from eating the leaves. I personally used it on the lawn and around the windows n doors to keep the bugs n mosquitoes away and it worked. I read this in magazine from old sturbridge village. Cant recall what year
Aspirin is the remedy for fungal plant problems, Black spot, powdery mildew, and rust are a terrible trio of fungi, which can attack and destroy your plants. Scientists have found that two uncoated aspirin tablets (325 milligrams each) dissolved in 1 quart of water and used as a foliar spray can thwart these diseases.
Are you a big coffee drinker? If you are, you will have used coffee grounds. Don't throw them away...used them in the garden. There are many ways to use them. Camellias, hydrangeas, and roses are all nitrogen loving plants so the coffee grounds help. The grounds are also a great deterrent for slugs and snails around hostas and other plants that the pests love.