There are two suggestions here for homemade plant food. Homemade plant food is easier on the environment and your produce is safer to consume. With many gardeners practicing green gardening these plant foods are great, Plus the cost is easier on the budget.
photo credit: pdugmore2001
1. A friend of mine uses this plant food recipe in his garden and says it is the best plant food there is. I haven’t tried it myself but he always has a great garden!
HOMEMADE PLANT FOOD MIX
In a gallon jug of tepid water place:
1 teaspoon Epsom salts
1 teaspoon saltpeter
1 teaspoon baking powder
1/3 teaspoon ammonia
This is a complete plant food and should be used only once every 4 to 6 weeks. Too much will harm and weaken the plant. It can be stored and saved.
2. I myself use a manure tea blend and it works well. As with all plant foods and fertilizer too much can be as bad as not enough. Experimenting and taking notes on results will help you decide how much your garden needs.
Take one coffee can and fill it with any manure. (I suggest, cow, horse, chicken or rabbit manure) Place the manure in a piece of cloth and tie to close. Add the cloth bag to a 5 gallon bucket of water and let it brew for a few days. It will be ready to use. I usually water this manure tea down by one half. So use a ten gallon bucket and fill half way up with water then add the manure tea.
NOTE: For indoor plants I only use a few table sppons of the manure in a pint of water.
Homemade plant foods are better for most plants. There is less of a tendency for the plants to get burned or hurt from a natural plant food