Hi I have knitted the sirdar leaf square baby blanket. I am having trouble sewing it up I have made it white and blue can’t get it to match up also don’t know which stitch to use when sewing. I’ve managed to get it into the squares from the 4 leaf pieces. Thank you

Welcome to KH!

I find that a backstitch makes it easier to line up stripes either in colors or in patterns. There are many comments on the difficulties in seaming this lovely blanket or at least on the number of seams to be worked.
This project used a lining to cover over the resulting seam.