Crafting for Valentine’s Day? Try this free pattern to turn a crochet heart into a solid granny square! Start by making a cute crochet heart, and then transform it into a crocheted square with this easy tutorial. You can find the complete written and photo tutorial on the blog. Solid granny square patterns are known for their quick and easy construction. They’re perfect for making blankets, pillows, bags, cardigans, and a variety of other projects. For this particular granny square, you’ll need 8 ply yarn and a 4 mm crochet hook. The finished heart granny square measures 5 inches.