How to Join Double-Knit Selvedges When Every Edge Stitch Must Be Worked

In double stockinette, the stitches alternate between the two layers: knit one for the face toward you, then purl its partner for the face away from you. TKGA calls these companions a double stitch pair. Wrapping the yarns around each other at the edge connects the forward and reverse layers; leaving that connection out allows the sides to remain separate. TKGA: Double Knitting

Think of the edge connection as a separate instruction from the stitches themselves. You still work the first knit stitch and its purl partner. You also work the final knit stitch and its purl partner. Nothing is left unworked to create the join.

A selvedge does not inherently require slipping. Joyce Jones’s technical article explains that selvedges can continue the body’s stitch pattern, while a slipped stitch becomes elongated over two rows. That distinction matters when every edge stitch must be worked on every row. TKGA: Selvedge Stitches

First, identify the construction in your instructions. The method below assumes each row works both layers through alternating knit and purl stitches. Some double-knitting instructions instead work one layer while slipping the other; those require a different row sequence. TKGA describes both constructions. TKGA: Double Knitting

Next, mark the first and last stitch pairs on your working copy of the pattern. Establish which yarn each stitch requires after turning. For a plain sample with colour A facing you, knit with A and purl with B; on the return row, with B facing you, those roles reverse.

Keep the existing stitch count. Do not add border stitches or combine the edge pair merely to make this connection. Before altering a designed border, check whether its stitches already serve a finishing purpose. TKGA’s selvedge guidance specifically recommends checking the pattern’s existing allowances. TKGA: Selvedge Stitches

Use one consistent crossing point at each turn. The following sequence places it at the beginning of the new row:

1. Finish the previous row, working its final knit-and-purl pair as instructed.
2. Turn the fabric.
3. Identify the yarn needed for the first knit stitch. Bring that yarn underneath the other working yarn, making one edge crossing.
4. With both yarns behind the work, knit the first stitch using its assigned yarn.
5. Bring both yarns forward between the needle tips. Purl the next stitch using its assigned yarn.
6. Continue across the row in the established double-knitting pattern, working the final pair too.
7. Turn and repeat the same edge routine.

Taking the new working colour underneath the other yarn is the explicit row-start method taught by designer Jen Arnall-Culliford. Moving both strands together—behind for knits and in front for purls—keeps the unused strand between the layers. Simply Yarn: Make reversible fabric with double knitting

DROPS describes another timing sequence: work the final knit and purl stitches, cross the yarns, then turn and begin the next row. Choose one timing convention for your practice. Adding a crossing before the turn and another afterward makes it harder to track the connection. DROPS: Double Knitting—edge stitches

Use this proposed practice check on a small plain section or a separate swatch. It is a diagnostic exercise, not a reported test result. Two contrasting yarns make the route of each strand easier to inspect.

For example, prepare 12 alternating stitch pairs: 24 individual stitches, with 12 belonging to each layer. Follow your established double-knitting cast-on and setup. Work several plain rows using the row-start crossing, then pause with the stitches still on the needle.

Check three things independently:

• Count: You should still have 24 individual stitches. The crossing itself adds none.
• Connection: Gently separate the layers beside each side edge and look for the strand linking them.
• Shape: Lay the sample down without stretching it. Compare the height and looseness of the two edges.

Record which edge has a problem and whether it concerns connection or appearance. An edge that opens needs a different investigation from an edge that is closed but uneven. This simple distinction helps you change one action at a time.

Observation	First check	Next action
Layers separate at the side	Was the crossing omitted or undone while arranging the yarns?	Trace the strands at the most recent turn and repeat the connection deliberately.
Edge stitches look stretched	Were the needle tips spread apart while forming them?	Work the edge close to the tips and compare the next few rows.
A horizontal strand appears across a face	Did only one yarn move between front and back?	Recheck the knit-to-purl movement with both strands together.
Stitch count changes	Was an extra loop made during the turn?	Inspect the turn before continuing; the edge wrap should not become a stitch.

The first two checks follow TKGA’s guidance on edge wrapping and avoiding stretched selvedges. The strand-position check follows Arnall-Culliford’s instructions for carrying both yarns together. The count check is a practical way to confirm that a yarn crossing has stayed separate from stitch formation. TKGA: Double Knitting, Simply Yarn: Make reversible fabric with double knitting

If you discover an unjoined section lower down, starting the correct crossing now only establishes the connection from that point onward. Mark the earlier section before deciding whether to undo and rework it. Inspect a few rows promptly so the same omission does not continue unnoticed.

Treat the edge crossing and colour selection as two separate decisions. Read the pattern to choose the first stitch’s colour, make the connection, then work that stitch. Avoid memorising “always knit with A first,” because the required colour depends on which face and motif row you are working.

For conventional reversible charts, each square can represent a knit-and-purl pair, with opposite colours on the two faces. Follow the chart’s own key and return-row instructions. Arnall-Culliford’s tutorial explains this reversal when reading flat double-knitting charts. Simply Yarn: Make reversible fabric with double knitting

Once the plain practice edge is satisfactory, repeat the check using the actual edge colours from your project. Continue when you can identify the connection at both sides, preserve the stitch count, and work every edge stitch without hesitation.

Joining separate panels is a different finishing task. Mattress stitch joins vertical knitted edges, and a worked stockinette selvedge is suitable preparation: Ysolda’s tutorial specifically advises against slipping the first or last stitches of rows intended for seaming. Its standard seam turns an edge column from each piece toward the inside, creating a ridge. Ysolda: Learn to Knit—A Step-by-Step Guide to Mattress Stitch

For a reversible double-knit project, first establish which layers the assembly instructions intend to connect and where that ridge will sit. Sample the proposed seam before sewing a long join. A row-turn crossing closes the layers of one piece; panel assembly needs its own planned yarn path.

For the worked selvedge covered here, use a repeatable routine: finish every stitch, turn, connect the yarns once, and begin the next pair. Check both edges early. That gives you a clear way to preserve the pattern while building the side connection into each row.

• Double Knitting — Jennifer Kent, The Knitting Guild Association, Cast On, Spring 2024
• Double Knitting: edge stitches — DROPS Design
• Make reversible fabric with double knitting — Jen Arnall-Culliford, Simply Yarn
• Selvedge Stitches — Joyce Jones, The Knitting Guild Association, Cast On, Summer 2021
• Learn to Knit: A Step-by-Step Guide to Mattress Stitch — Ysolda