The verb sew always relates to stitching, knitting, and other tasks involving a needle and thread or a sewing machine. It also appears in the figurative phrasal verb sew up, meaning to complete successfully or to make sure of.
As a verb, sow means (1) to scatter seed for growing, or (2) to implant. It’s the correct word in the idiom sow [one's] wild oats.
The Dornish are like the Iraqi Kurds of Westeros, ready for revenge once they sew up their big patron. [Wired]
Since March, the cross-community textile art project has brought women together for twice-weekly sewing meetings. [Irish Times]
How do you sow your wild oats, live the salad days of your youth, and still remain the darling of golf? [ESPN]
The journalists were unwittingly sowing the seeds of their own destruction. [Australian]