Back loop only crochet changes where the hook enters while leaving the rest of the stitch unchanged. This simple technique creates a subtle ridge and can help shape flat bases.

Identify the Back Loop

Each stitch has two top loops. The front loop is closest to you; the back loop is farther away. A standard stitch is worked under both loops.

How to Crochet in the Back Loop Only

Locate the back loop of the next stitch.
Insert the hook through that loop only, leaving the front loop unworked.
Complete the required stitch normally.

Understanding the Result

Working in the back loop only leaves the unused front loops visible as a slight seam or ridge. This structure is useful when forming flat areas such as the top of a crocheted top hat or the base of a foot.

BLO in Rows and Rounds

In flat rows, turn the work as instructed and identify the loop farthest from you on the row you are about to work. Because the work turns, the visible ridge alternates sides. In rounds, BLO can form a continuous ridge around a base or mark a fold line. Always identify the loops from the current working position rather than from the finished object's front.

BLO, FLO, and Ribbing

BLO leaves the front loop unused; front loop only (FLO) does the opposite. Repeated rows of stitches worked BLO can create flexible ribbing, while one BLO round can create a structural ridge. The effect depends on stitch choice, yarn, tension, and construction.

Common Placement Mistakes

Do not insert under both top loops. If the ridge disappears, pause and confirm that only one loop is on the hook shaft before completing the stitch. Avoid catching the horizontal strand below the top loops unless the pattern specifically names that strand.

Visual guide

Use these images as placement checkpoints. Match the loop count and hook position before moving to the next step.

Step 2 in the Back Loop Only Crochet: BLO in Rows and Rounds visual guide. — Visual checkpoint 2: compare the hook, working loop, and fabric position with the written instruction.

Step 3 in the Back Loop Only Crochet: BLO in Rows and Rounds visual guide. — Visual checkpoint 3: compare the hook, working loop, and fabric position with the written instruction.