Learn to Crochet - Weave in Ends
Weave in ends securely before blocking pieces or sewing seams. Securely woven ends will not come loose with wear or washing. There are several methods for weaving in ends—use whichever one works best for you.
(1) Thread yarn end through a blunt tapestry needle. Whipstitch the end around several stitches. Trim the end close to work.
(2) The woven end should be nearly invisible.
(3) Another method of weaving in ends is to run the end under several stitches, wrap it around a stitch and then run it under several more stitches. For even more security, reverse the direction and weave back under and over a few more stitches. Trim the end close to work.