Don't throw away those eggshells because they can be used as fertilizers. Just throw them in a food processor and crush them until they turn into powder. It act as a good source of potassium and calcium for vegetables, flowers, and fruits. The crushed eggshells can be mixed in with the soil or scattered on top and around the plant.
I also have success with milk as a fertilizer. Once a week I mix one part of milk with 4 parts of water and spray it on the tomato leaves. Another tip from my mom is to save the water that you use to rinse the rice. The water has a milky color and it's supposed to have lots of nutrients.
Do you know any secret homemade fertilizer? I'd love to know about it!