Stacked Clusters Free Crochet Stitch.
CL
[Yo, insert hook in next dc, yo and draw up lp, yo and draw through 2 lps on hook] 5 times, yo and draw through all 6 lps on hook.
(ch a multiple of 6 sts + 3)
Row 1 (WS) 5 dc in 6th ch from hook, skip 2 ch, 1 dc in next ch, *skip 2 ch, 5 dc in next ch, skip 2 ch, 1 dc in next ch; rep from * to end. Turn.
Row 2 Ch 5, skip first dc, *CL over next 5 dc, ch 2, 1 dc in next dc, ch 2; rep from *, end CL over last 5 dc, ch 2, 1 dc in top of t-ch. Turn.
Row 3 Ch 3, skip 2 ch, 5 dc in CL, *skip 2 ch, 1 dc in next dc, skip 2 ch, 5 dc in next CL; rep from *, end skip 2 ch, 1 dc in 3rd ch of t-ch. Turn.
Rep rows 2 and 3.