Crocheted Christmas Trees Crochet a straight chain. Long enough to cover an entire cone. You can make a cone out of poster board. I had some old trees from kirklands. Begin covering the cone going around each time with the crocheted chain. Use a dab of hot glue at the bottom and at the very top to secure the yarn. You can use thin or thick yarn Embellish with picks or any other items you’d like. I used mini pine cones. Use any color yarn. You can change it up each to match your decor.