Fertilizers From Food
Use the water from boiling eggs to fertilize your plants.
The eggshells themselves make good fertilizer. Letting them dry thoroughly will allow you to easily crush them into a powder. But, leaving them in larger pieces will keep out snails, slugs and cats.
Roses love coffee grounds, as do hydrangeas and gardenias You can get all you want from most coffee houses, just be sure to let the coffee grounds dry before using them as fertilizer once a month. Coffee grounds are also good for blueberries, evergreens, azaleas, roses, camellias, avocados, and certain fruit trees.
To grow beautiful azaleas, water them occasionally with a mixture of 2 tablespoons of white vinegar to 1 quart water. Azaleas love acidic soil.
Bury a banana peel down under the roots of a rose bush for more blooms than ever.