Fill half of a plastic trash can or large drum with seaweed. Fill the rest of the container with water. Cover the container with a piece of wood or a lid that can be secured in place by putting a rock on top. After approximately two months, the seaweed will have decomposed and turned the water thick and brown. This liquid can be diluted and sprayed on flower beds and gardens.
Dig a hole a few feet wide and a couple of feet deep. Add vegetable peelings, grass clippings, and other organic scraps, along with any earthworms you find in the garden. Cover the hole with a piece of black plastic. The earthworms eat the compost and make rich fertilizer, perfect for use in the garden.
Collect rabbit droppings, let them dry, and add them directly to flower beds and gardens as fertilizer. Rabbit droppings are naturally high in nitrogen, more so than horse or pig manure. The droppings can burn plants if they are used fresh, so be sure to let them dry before you use them.
Let eggshells dry out, then blend them in a blender or by hand until they are a powder. Scatter the powder around fruit trees and roses, and over vegetable beds. Eggshells have a very high calcium content, and they also contain nitrogen, which makes them a natural fertilizer.
Add coffee grounds to your compost heap or sprinkle them around trees and roses. Coffee grounds contain nitrogen, phosphoric acid, and potash, so they work well as fertilizer. Plants that need acid, such as camellias, roses, and avocados, will thrive with a dose of coffee grounds every now and again.