7 Best Do-It-Yourself Garden Fertilizers

6. Infusion of organic compost :

Produced in exactly the same way as the cut grass infusion, but with organic compost. Put some organic compost in a bucket and cover it with water. Let it macerate for 2 or 3 days, then filter it.

This gives a much richer liquid with a variety of nutrients, perfect for any plant. Dilute before use so that it has an amber color (no darker). You can spray it or water plants during the growing season only.