The most important factor for healthy plant growth is healthy soil. As mentioned in Part 1, the key to building healthy soil is the regular addition of soil amendments like compost. If you are looking to replenish specific nutrients or to grow heavy feeders like tomatoes, you can make your own organic plant food at home. You need only apply small quantities when plants need it, rather than large amounts over the whole garden. Remember: LESS IS MORE when it comes to fertilizer. Read on for some low-cost or no-cost options for making your own gentle organic fertilizers at home.