Leave a 4–6 inch tail on the old yarn and the new yarn
Finish the last stitch with the old yarn until the final yarn-over
Yarn over with the new yarn instead of the old yarn
Pull the new yarn through to complete the stitch
Continue crocheting with the new yarn
Weave in both tails securely after finishing
For a stronger join, use the double yarn-over method
For a cleaner join, change yarn at the end of a stitch in the same color or texture area
For invisible joins, use the Russian join or splice if the yarn type allows it