Can you insert a yarnover a row later?

Am knitting a lace border and discovered I forgot a yarnover early in 1 row. Knitted across the rest of the row then back across to discover my error. Is there any possible way to insert a yarnover after the fact (somehow???)? I don’t want to rip it all out but that is the best alternative if I can’t sneak that yarnover in somehow.

none known to me. If you don’t want to frog and the rows aren’t terribly long, you can unknit, despite the fact that some decreases are hard to unknit.

sigh…I was afraid of that. Difficult decreases, a bunch of knitting & purling through the back loops, & longish rows mean I’ll be frogging the danged thing. Again.

Lace can be cruel.

If it isn’t too tight, you can treat it as a “make 1”. Just pick up that strand where the yarn over ought to be and wobble it a bit to work loose a little slack. See if it suits you. If it does, no harm, no foul. If you’re unhappy with the way it looks, then you start frogging.

Yes you can, work to the point where the YO should have gone and just pick up the yarn between the 2 sts.

It’s called an “afterthought yarn over” and there’s a video under the Free Videos tab at the top of the page, Increases, if you’d like to see it.