Bayside Seed Stitch Pillow Cover: A Step-by-Step Guide to a Coastal Classic

There is something quietly satisfying about a seed stitch pillow cover. It is not flashy. It does not demand attention the way a cable knit or a lace panel might. Instead, it earns its place through texture — that beautiful, pebbly surface that comes from alternating knit and purl stitches in a simple but endlessly pleasing pattern. When you add the color palette of the coast — the bleached blues, the driftwood grays, the soft creams of sea foam — you get something that feels right at home on a porch swing, a linen sofa, or tucked into the corner of a reading chair by a window that looks out over the water. That is the essence of the Bayside Seed Stitch Pillow Cover, and in this guide, we are going to walk through everything you need to know to make one.

Whether you are an experienced knitter looking for a meditative weekend project or a confident beginner ready to move beyond simple stockinette, this pattern is approachable, satisfying, and genuinely useful when it is finished. Let us start at the beginning.

What Makes the Seed Stitch So Special

Before we get into yarn weights and needle sizes, it is worth spending a moment on the stitch itself. The seed stitch — sometimes called the moss stitch in British knitting traditions, though there are slight variations between the two — is worked by alternating knit and purl stitches across every row. Unlike ribbing, where you stack knit above knit and purl above purl, the seed stitch asks you to do the opposite: knit above purl and purl above knit. The result is a fabric that lies perfectly flat, has a gorgeous bumpy texture on both sides, and does not curl at the edges the way stockinette tends to do.

That last quality is particularly wonderful for pillow covers. You do not need to block aggressively or add a border to keep things lying neat. The seed stitch does the work for you. It is also a reversible fabric, which is a nice bonus when you are making something that might get flipped over, slid around, or admired from multiple angles.

The Bayside colorway leans into the natural, nubby quality of seed stitch beautifully. Yarns in blue-gray tones, coastal cream, and deep ocean navy all catch the light differently against that textured surface, creating a pillow cover that looks handmade in the best possible sense — thoughtful, crafted, and entirely unlike anything you would find at a big-box store.

Materials You Will Need

Getting your materials right from the start will save you time and frustration, so let us be specific.

Yarn: For a standard 18×18-inch pillow insert, you will need approximately 300 to 400 yards of a worsted weight yarn. A light worsted or DK weight will give you a more refined, drapey result, while a true worsted or aran weight will produce something chunkier and more substantial. For the Bayside aesthetic, look for yarns that have a slightly rustic character — linen blends, cotton-wool blends, or a 100% cotton with a matte finish all work beautifully. Some excellent choices include Lion Brand Fishermen’s Wool in Oatmeal or Natural Brown, Cascade 220 in any of its oceanic blue tones, or Paintbox Simply DK in Dolphin Blue or Stone Blue. If you want a pop of coastal contrast, consider working the front in a soft coastal blue and the back in a natural cream — two simple skeins is often all you need.

Needles: For worsted weight yarn, US size 7 (4.5mm) or US size 8 (5.0mm) straight or circular needles work well. Seed stitch tends to run a bit tighter than stockinette for many knitters, so if your gauge is naturally on the snug side, go up half a size.

Gauge: Aim for approximately 18 stitches and 28 rows per 4 inches in seed stitch. This is a guideline rather than an absolute rule for a pillow cover — a slight variation in gauge will just mean a slightly different finished size, and since pillow inserts come in standard sizes, you have some wiggle room.

Other supplies: You will need a tapestry needle for seaming and weaving in ends, stitch markers if you like to use them, scissors, and either a zipper (about 14 inches long) or a set of three or four medium buttons and a crochet hook or spare needle to work buttonholes. The envelope-style back closure is the most beginner-friendly option and requires no sewing beyond what you would do to close the side seams.

Getting Your Gauge Right

Swatching is the step that many knitters skip, and for a garment, that can cause real problems. For a pillow cover, you have a little more flexibility — but it is still worth doing a quick gauge swatch, especially because seed stitch and stockinette often have slightly different tensions, even for the same knitter using the same yarn.

Cast on 24 stitches and work in seed stitch for at least 4 inches. Bind off loosely, wet block the swatch, and let it dry flat. Then measure your stitch and row gauge. If you are getting fewer stitches per inch than the pattern calls for, go down a needle size. If you are getting more, go up. A small difference — one or two stitches across four inches — is generally fine for a pillow cover and will just shift your finished dimensions slightly.

The Seed Stitch Pattern Explained

For anyone unfamiliar or in need of a refresher, here is the seed stitch worked flat over any number of stitches:

For an odd number of stitches, the pattern is beautifully simple: every row is knit 1, purl 1, and you repeat across, ending with a knit 1. Because you are always starting and ending with a knit stitch, the stitch alignment automatically staggers itself row by row.

For an even number of stitches, row one is knit 1, purl 1 across, and row two is purl 1, knit 1 across. You alternate between these two rows throughout.

The trick that trips some beginners up is remembering to move your yarn to the front before a purl stitch and to the back before a knit stitch. This is habit-forming quickly, and once it becomes automatic, seed stitch is actually a restful, meditative thing to work. The alternating rhythm is easy to settle into, and because there is no complicated chart to follow, you can watch a movie, sit in a conversation, or listen to a podcast without losing your place.

The Pattern: Bayside Seed Stitch Pillow Cover

This pattern is written for an 18×18-inch pillow insert using worsted weight yarn and US size 8 (5.0mm) needles. It produces a knitted fabric panel that, when seamed, slips over a pillow insert and closes with an overlapping envelope-style back.

Finished dimensions: Approximately 18 inches wide by 18 inches tall.

Cast on: 82 stitches.

Work in seed stitch (row 1: k1, p1 across, end k1; row 2: repeat row 1) until piece measures 18 inches from cast-on edge. Bind off loosely in pattern.

For the back, you will work two overlapping panels instead of one solid piece. This creates the envelope closure that allows you to insert and remove the pillow without any zipper.

Back panel A: Cast on 82 stitches. Work in seed stitch until piece measures 12 inches. Bind off loosely in pattern.

Back panel B: Cast on 82 stitches. Work in seed stitch until piece measures 12 inches. Bind off loosely in pattern.

To assemble: Lay the front panel flat with the right side facing up. Place back panel A on top with the right side facing down, aligning the bottom edges. Place back panel B on top, also right side down, aligning the top edges. The two back panels will overlap in the middle by approximately 6 inches. Pin all four edges together and seam around the perimeter using mattress stitch or your preferred seaming method. Turn right side out through the opening in the back. Insert your pillow.

Seaming Tips for a Polished Finish

The seaming step is where a handmade pillow cover either looks professionally finished or reveals its amateur edges — quite literally. Mattress stitch is the gold standard for invisible seams on flat-knit pieces. To work mattress stitch, thread a tapestry needle with a length of matching yarn. With both pieces right-side up and edges touching, insert the needle under the bar between the first and second stitches on one piece, then under the corresponding bar on the other piece. Continue working back and forth, pulling the yarn snug every few stitches. The seam will virtually disappear into the fabric.

If you prefer a decorative edge, a three-needle bind-off or a simple whip stitch in a contrasting color can also look very intentional and charming, particularly in a Bayside color palette where natural cream against coastal blue creates a nautical, rope-like border.

Customizing Your Bayside Pillow Cover

One of the great joys of a seed stitch pillow cover is how easily it adapts. Here are a few ways to make the Bayside version your own.

Color: The simplest customization is color. A single solid in a stormy ocean blue is classic and serene. Two-color versions — perhaps a soft sage for the front and a sandy cream for the back — bring in the full range of coastal nature. If you are comfortable with intarsia or simple stripes, a horizontal stripe worked in seed stitch in three graduating ocean tones creates a stunning ombré effect that is more complex-looking than it actually is to execute.

Yarn texture: Seed stitch is at its best with yarn that has good stitch definition. Tightly spun wools and cotton-linen blends allow the bumpy texture to read clearly. Very fluffy or halo yarns like mohair or angora can obscure the stitch pattern, though they produce a beautifully soft, cloud-like result that has its own appeal. A raffia or jute blend takes the coastal element in a more literal, bohemian direction.

Size: To adjust for a 20×20-inch insert, add approximately 10 stitches to your cast-on for each additional inch of width. For length, simply knit more rows. The seed stitch is highly forgiving about sizing adjustments.

Embellishments: A row of shell buttons down the back opening, sewn on by hand in a matching or contrasting color, elevates the pillow from simple to boutique. Thick, chunky buttons in bleached bone or ocean-glass blue are widely available at craft stores and feel very much at home in a coastal interior. You could also work a simple twisted cord in a coordinating color and tie it around the pillow for a gathered, sack-like look that is playful and beachy.

Caring for Your Seed Stitch Pillow Cover

A pillow cover works hard. It gets sat on, leaned against, and inevitably, eventually, something gets spilled on it. The good news is that most knitted pillow covers are entirely washable, especially those made with cotton, cotton-blend, or superwash wool yarns.

For cotton or linen-blend covers, machine washing on a gentle cycle in cold water is generally safe. Lay flat to dry to prevent stretching. For wool or wool-blend covers, hand wash in cool water with a small amount of wool wash, gently squeeze out excess water without wringing, and lay flat on a clean towel to dry. Avoid hanging a wet knitted item, as gravity will stretch it out of shape.

Blocking after washing is a nice habit. Pinning the cover to its exact finished dimensions while damp will keep the seed stitch looking even and the edges crisp. It takes only a few minutes and makes a noticeable difference in the final appearance.

Why Handmade Pillow Covers Make Such Good Gifts

If you are thinking about making a Bayside Seed Stitch Pillow Cover as a gift — for a housewarming, a birthday, a new home — it is worth knowing that handmade textile gifts tend to be among the most treasured. Unlike a purchased item, a knitted pillow cover carries the time, intention, and care of the person who made it. The recipient knows that someone sat for hours, row after row, making something specifically for them. That is not nothing. That is actually quite a lot.

For coastal home lovers, beachhouse owners, or anyone who decorates in the relaxed, sun-bleached palette of the shore, a seed stitch pillow in Bayside tones is an incredibly considered gift. It is practical, beautiful, washable, and made to last. If you add a handwritten note explaining the yarn you used, the stitch pattern, and any care instructions, you elevate the gift further into something almost archival.

A Few Final Thoughts Before You Cast On

The Bayside Seed Stitch Pillow Cover is the kind of project that earns a permanent place in your knitting rotation. It is simple enough to be relaxing but textured enough to be interesting. It finishes in a weekend if you have a dedicated afternoon or two, or stretches pleasantly across a few weeks of evening knitting. The result is something genuinely beautiful and functional, something that will live on a couch or a bed for years and look better with a little wear.

If you are new to seed stitch, give yourself permission to take it slow at first. The yarn movement between knit and purl stitches is the main technical habit to build, and it comes quickly. By the end of your first back panel, it will feel natural. By the time you seam the whole thing up and push a pillow inside, the satisfaction is real and complete.

Cast on, and let the coast come to you, one stitch at a time.