Change to the new ball on the last pull-through of a stitch, at a row edge when you can, and leave both tails long.
Before you start: Single crochet
Join at an edge when possible
- Stop while enough old yarn remains to finish the row and weave its tail. If it will run out mid-row, undo to an edge or join at the available stitch.
- Work a stitch until its last pull-through. Use the new yarn for that pull-through, leaving a tail on both yarns.
- Continue with the new ball. Adjust the old stitch and new active loop without cinching the fabric.
- Thread each tail separately through the backs of nearby stitches. Change direction through another path. Keep the fabric at its normal width while weaving.
Match the actual ball
Check the fiber, color name, dye lot and yarn length on the new label. Two colors or ball sizes of the same yarn can differ in fiber or length.
If the dye lots differ, hold the yarns together in the light you will use the finished item in. A stripe or deliberate color block is an option when a continuous color change would be distracting.
If the join pulls open
Do not rely on a short knot at the join. Leave the tails accessible until you have gently stretched the surrounding fabric in its normal directions.
Fuzzy, slippery or loosely spun yarns need different finishing care. Revisit a join that slips before cutting away the available tail. Follow the exact yarn’s care instructions when washing the swatch.