I saw this argyle heart wreath on Etsy and decided to give it a go. One of my favorite fall wreaths followed similar steps. That project lives here on my blog Basically you just need a foam wreath form, yarn, felt (for your hearts), and scissors.
Tie or tape one end to the wreath and just start wrapping.
I tied off the end and tucked in the end. I then cut out heart shapes from the felt and you can wrap them like that, but I did add a little glue to hold them in place (hot glue or fabric glue would work).
Then I crisscrossed back and forth to create the argyle design which I loved.