If you have gotten this far without any trouble, the rest should be a piece of cake!
From now on, we are going to repeat our pattern starting with Row 2 and ending with Row 7. We need to repeat the pattern additional 14 times. That will give us the total of
7 + 6*14 = 91
The picture below shows Rows 2-7 worked one additional time. That is 13 rows in total (7 + 6 = 13)
And this picture shows how my baby blanket is growing in size, but it’s not big enough yet.
And finally here I have 91 rows!