How to Knit Double Seed Stitch

It’s recommended that you choose ribbed cast on for this stitch (such as long tail cast on for rib stitch) to achieve the best result.
(Flat knitting)
Start by casting on a multiple of 4 stitches.
Row 1 & 2: (K2, P2) across
Row 3 & 4: (P2, K2) across
Repeat Row 1-4 to desired length.

(Circular knitting)
Start by casting on a multiple of 4 stitches.
Round 1 & 2: (K2, P2) across
Round 3 & 4: (P2, K2) across
Repeat Round 1-4 to desired length.

Watch to Learn

Watch this video to learn how to knit Double Seed Stitch, to simplify the process, I am using a basic long tail cast on in the video, which is OK but is not the best option for ribbed stitch.