How to Filet Crochet Blocks
Use the filet crochet technique to create filled blocks in crochetwork. In filet crochet, filled blocks create design while open spaces form the background. Blocks consist of 3 double crochet stitches that you can work in the stitches or spaces of the previous row.
Crochet the foundation chain: Multiply the number of blocks in the row by 3.
When you read a filet-crochet chart, each block in the chart is actually three stitches. This means that each row of filet crochet has a multiple of 3 stitches plus 1 double crochet at the end to complete the last space or block.
Add 3 more chain (ch) stitches for the turning chain.
This turning chain is for the next row’s first double crochet (dc) stitch.
To work the first row of blocks, double crochet (dc) in the fourth chain (ch) from the hook.
Double crochet in each of the next 2 chain stitches to complete the first block.
Double crochet in each of the next 3 chain stitches to complete the second block.
Repeat this step across the row. You should have 5 blocks at the end of the row (or 15 double crochet stitches, plus the turning chain). You always have 1 more stitch than the multiple of 3.
Work the second row of blocks by turning your work.
Each time you turn your work to crochet back across the previous row, a different side of the piece will be facing you.
Chain (ch) 3.
This step creates the turning chain for your first double crochet (dc).
Double crochet in each of the next 3 double crochet stitches.
You make the first block in this step.
Double crochet in each of the next 3 double crochet stitches to complete the second block.
Repeat this step across the row. You should have 5 blocks at the end of the second row.