You will need 7 granny circles. One for the centre and 6 to sew around it.
Put one circle in the centre. Sew circle 1 to centre circle with 6 stitches.
Sew circle 2 to circle 1 with 6 stitches, and to the centre circle with 5 stitches.
Sew circle 3 to circle 2 with 6 stitches and to the centre with 5 stitches. (Any time you join 3 circles at a corner, pick up a stitch on each of the other 2 circles, making a triangular corner, as you can see in the diagram).
Sew circle 4 to circle 5 with 5 stitches, and to the centre with 6 stitches (making a triangular corner again).
Sew circle 5 to circle 4 with 5 stitches, and to the centre with 5 stitches.
Sew circle 6 to circle 5 with 5 stitches, to the centre with 6 stitches, and finally to circle 1 with 5 stitches.
Keep going around for the number of rounds required. Always sew 5 or 6 stitches, adding more hexagons every round.
Text and images are derived from the Harben House manual, unknown date, no copyright stated. All reasonable lengths to find the copyrighted owner and gain official permission were exhausted. Edited text and images copyright Sarah Bradberry 2004.