What is provisional cast on
Provisional cast on is a technique where you cast on stitches using waste yarn that you later remove. After removing the waste yarn, you get live stitches on the bottom edge — you can put them on a needle and knit in the opposite direction. It's like being able to knit from both ends of your work.
When to use provisional cast on
Bidirectional knitting — when you want to knit from the center outward in both directions (scarf with identical ends, sweater knitted from the waist up and down).
Seamless joining — instead of sewing two pieces together, you can pick up stitches from the provisional cast on and knit the connecting piece directly.
Kitchener stitch — when grafting (invisible joining), you need live stitches on both ends — provisional cast on provides them.
Tubular cast on — some elastic edges begin with provisional cast on and then transition to ribbing with yarn overs.
Method 1: Crochet provisional cast on
Step 1: Take waste yarn in a contrasting color and a crochet hook. Crochet a chain 5–10 stitches longer than you need.
Step 2: Take your knitting needle and working yarn. Pick up stitches from the back bumps of the chain — insert the hook into the bump on the back of the chain, pull through the working yarn and place the stitch on the needle.
Step 3: Knit normally with the working yarn. The waste chain remains at the bottom edge.
Unraveling: When you need the live stitches, find the end of the chain and unravel — gradually thread the stitches from the working yarn onto a needle.
Method 2: Invisible provisional cast on
Step 1: Stretch the waste yarn along the needle and hold it with your thumb.
Step 2: With the working yarn, wrap alternately around the needle and waste yarn — up over the needle, down under the waste yarn, up over the needle. Each wrap = one stitch.
Unraveling: Pull out the waste yarn — the stitches will release and you can place them on a needle.
Important note
When unraveling, you'll have half as many stitches as it appears — the alternating wrapping creates stitches and gaps between stitches. Account for this in your planning.
The waste yarn must be in a contrasting color and smooth (preferably cotton) — it unravels easily. Don't use fuzzy yarn — it will be difficult to remove.
