A link to the pattern is always helpful.
I'd read it that you have to cast on 5 stitches at the beginning of the next 2 right-side rows; then cast on 4 at the beginning of the following rs row; then cast on 3 at the beginning of the rs row after that.
Use a cable or knitted cast on with the rs facing you and then work across the new stitches and the old.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry