Gather neem seeds or neem leaves, a clean bowl, water, a grinder or mortar and pestle, a cloth or fine strainer, and a container
Wash the neem seeds or leaves thoroughly
Dry the neem seeds or leaves completely
Crush the neem seeds or grind the neem leaves into a coarse paste
Add a small amount of water if needed to help form the paste
Place the paste in a bowl and let it sit for several hours
Add warm water and mix well
Strain the mixture through a cloth or fine strainer
Collect the liquid and let it rest so the oil separates
Skim off the oil layer from the top
Store the neem oil in a clean, dry, airtight container
Keep the container in a cool, dark place