Organic Gardening Magazine had great suggestions this month for using items in/around your home as plant food, rather than spending money or reaching for a chemical. Two of these seemed especially good for people living in the thick of the city (photo above is a big hint for one of them)...Organic Gardening suggest drying the shells out on a baking pan using the lowest oven setting, then pulverizing them in a food processor.
This leaves you with powder that can be sprinkled around base of your houseplants. It is a great source of calcium (chicken eggs are 93 percent calcium carbonate), and also a great way to raise the pH levels if your soil is too acidic.
The second is coffee grounds. They will give your plants a 'jolt' of nitrogen, phosphorus and potassium and are perfect for plants that like acidic soil.
Both make use of ingredients that served their use to make a free, natural plant fertilizer. The idea of drying and pulverizing the eggshells would also make them easy to store and share.
photo by Kate Shepard via Flickr
matt at apartment therapy dot com