Picutre courtesy Elizabeth Dimbleby
I used size 7 needles and green LB Jiffy because all squash have fuzzy leaves.
CO 5 sts.
R1: K
R2 (and all even rows): P
R3: K1, M1, K1, M1, K1, M1, K1, M1, K1
R5: *K1, M1, K1, M1, K1*; repeat twice more, placing markers between sections.
R7: K2, M1, K1, M1, K2; K1, M1, K1, M1, K1, M1, K1, M1, K1; K2, M1, K1, M1, K2.
R9: K3, M1, K1, M1, K3; K4, M1, K1, M1, K4; K3, M1, K1, M1, K3.
R11: K
R13: K9; K1, M1, K9, M1, K1; K9.
R15: SSK, K7; K13; K7, K2tog.
R17: SSK, K6; K13; K6, K2tog.
Lobe 1:
R19: K5, K2tog.
R21: K.
R23: SSK, K4.
R25: SSK, K1, K2tog
R27: Slip1, K2tog, PSSO
Bind off
Lobe 2:
R19: SSK, K9, K2tog
R21: SSK, K7, K2tog
R23: SSK, K5, K2tog
R25: SSK, K3, K2tog
R27: SSK, K1, K2tog
R29: Slip 1, K2tog, PSSO
Bind off.
Lobe 3: as Lobe 1; reverse the shaping.
Single crochet (Australia: double crochet) around the entire perimeter. May need to surface crochet on the underside to keep the lobes from curling. Attach leaf to pumpkin hat near the stem.