I am knitting my first Fair Isle sweater. The pattern calls for a yarn color change in row 2, but not again until row 7. Do I need to carry the yarn through all those 5 rows?
If by this question you mean do you carry it along like you did over the row you used the color on, the answer is no. I'd probably cut the yarn and join it in again when I needed it the next time if it was me, but it's up to you.