Crochet Floral Block: Coral Trellis Square

This generic pattern can be used with whatever yarn and hook/needle size you prefer.

Skill level: intermediate
Method of working: in the round

Special abbreviation
CL (cluster):
yrh twice, insert as directed, [yrh, pull through 2 loops] twice (2 loops remain on hook), * yrh, insert under 2 threads of lowest step of st just made, [yrh, pull through 2 loops] twice, * rep from * to * once more, yrh, pull through all 4 loops on hook.

METHOD
Make 8 ch, join into a ring with ss in first ch.
Round 1: 7 ch, [CL into ring, 5 ch, CL into ring, 2 ch, 1 dtr into ring, 2 ch] 3 times, CL into ring, 5 ch, CL into ring, 2 ch, ss in 5th of 7 ch.
Round 2: 7 ch, [CL in 2-ch sp, 5 ch, 1 sc in 5-ch sp, 5 ch, CL in 2-ch sp, 2 ch, 1 dtr in dtr, 2 ch] 3 times, CL in 2-ch sp, 5 ch, 1 sc in 5-ch sp, 5 ch, CL in 2-ch sp, 2 ch, ss in 5th of 7 ch.
Round 3: 7 ch, * CL in 2-ch sp, [5 ch, 1 sc in 5-ch sp] twice, 5 ch, CL in 2-ch sp, 2 ch, # 1 dtr in dtr, 2 ch, * rep from * to * twice more, then once again from * to #, ss in 5th of 7 ch.
Round 4: 7 ch, * CL in 2-ch sp, 5 ch, 1 sc in 5-ch sp, [1 ch, CL] 3 times in next 5-ch sp, 1 ch, 1 sc in next 5-ch sp, 5 ch, CL in 2-ch sp, 2 ch, # 1 dtr in dtr, 2 ch, * rep from * to * twice more, then once again from * to #, ss in 5th of 7 ch.
Round 5: 6 ch, ss in 5th ch from hook, * 5 ch, 1 sc in next 5-ch sp, 5 ch, 1 sc in 1-ch sp between 1st and 2nd of 3 CL, 6 ch, ss in 4th ch from hook, 2 ch, 1 sc in 1-ch sp between 2nd and 3rd of same 3 CL, 5 ch, 1 sc in next 5-ch sp, 5 ch, # 1 sc in dtr, 5 ch, ss in top of sc, * rep from * to * twice more, then once again from * to #, ss in first of 6 ch.
Fasten off.

ABBREVIATIONS / REFERENCES

ch = chain dtr = double treble (triple) crochet
sc = single crochet sp = space
ss = slip stitch

Excerpted with permission from 75 Floral Blocks to Crochet by Betty Barnden, St. Martin's Griffin, 2012.