I was making videos for the membership club the other day and just realised that the one I made for double moss was actually American moss, and not British double moss. Oops, that will need re-doing!
Having had a look through Google and YouTube, there seems to be a lot of confusion about seed, moss and double moss – mainly because Americans use different terminology to the British. But having done some research here’s a run down to help give other knitters some clarity.
British Moss (American Seed stitch)
Multiples of 2
Row 1: *k1, p1. Rep from * to end
Row 2: *p1, k1. Rep from * to end
Repeat rows 1 and 2 for pattern

American Moss
Multiples of 2
Rows 1 and 2: *k1,p1. Rep from * to end
Rows 3 and 4: *p1,k1. Rep from * to end
Repeat rows 1 to 4 for pattern.

British Double Moss
Multiples of 4
Row 1 and 2: *k2, p2. Rep from * to end
Row 3 and 4″ *p2, k2. Rep from * to end
Repeat rows 1 to 4 for pattern.

For all of the pattern versions you usually have edge stitches as well.
What I really like about these stitch patterns is that there is no wrong side, making them completely reversible. All of the patterns create dense and durable stitches which are quite thick when knitted up, superb for winter apparel and heavyweight household items like throws.