To apply sew on patches at home, you'll need a few basic supplies such as the patch itself, a needle, and thread that matches the color of the patch and the garment it will be attached to. Here are the steps to follow:

1. Choose the location where you want to attach the patch on the garment and make sure it's clean and dry.

2. Thread the needle and tie a knot at the end of the thread.

3. Place the patch on the garment in the desired location and hold it in place with a few pins to prevent it from moving.

4. Start sewing from the inside of the garment, pushing the needle through the patch and the fabric. Pull the thread all the way through until the knot catches on the fabric.

5. Take another stitch close to the first one, make sure it goes through the patch and the fabric. Keep repeating this process until you've sewn around the entire patch.

6. Tie a knot on the inside of the garment and cut any excess thread.

7. Remove the pins and check to make sure that the patch is securely attached. That's it! Your patch should be securely attached and ready to wear.