Seaming test (wool, interlocking/double filet crochet with sc borders)
From top to bottom:
Mattress stitch in back loops
Mattress stitch in third loops
Bickford/ladder stitch in back loops
Bickford/ladder stitch in third loops
First off, I'm appalled to be reminded how much nicer seams look when you do them in third loops (aka back bumps) instead of back loops, because back loops is much faster and much easier.
For a garment or blanket, I think I would opt for the ladder stitch in third loops. I've heard it's weaker than a mattress seam, (and it does not look nice at all worked in back loops, option 3, imo), but I appreciate how the extra slack lets the seam approximate the gauge(s) of the crochet—mattress seams are very taut, and the motifs can slide around and bunch up on them like curtains on a rod, which drives me nuts.













