Make your own plant food and keep your garden blooming

You don’t have to buy expensive plant food mixtures full of additives from gardening shops. Making your own homemade plant food is very easy, using common, inexpensive ingredients. Of course, composting makes great rich soil for plants, and since it uses your trash it’s totally free. But sometimes your plants may need a little something more specific.

Recipezaar has a general recipe for plant food.
Recipe Goldmine has several allegedly plant-specific recipes, but when you read them they’re all identical to the Recipezaar recipe. But do check out their Gelatine Plant Food, Yeast Plant Food and Houseplant Soil Mix.
HGTV tells you how to make a tea for pkants from fallen oak leaves and how to feed plants leftover coffee.
Frugal Living @ About.com lists an even simpler Epsom salt recipe and talks about sprinkling ground eggshells in place of lime. There’s also a vinegar fertilizer recipe and a very smart recommendation to use the water you siphon out of a fish tank to water the plants.
Some people say they give their plants one can of room temperature regular beer a month, and it keeps the plants alive and healthy for years.