I’m sure the…
I’m sure the costume department would be thrilled if they could just plant some seeds and grow costumes without actually having to sew anything, but I’m reasonably certain the word you want here is sewn.
Sow: To plant seeds, often by scattering them.
Sew: To join together by stitching, e.g. with needle and thread.
Me, planting costume seeds:
Reminder to water your costume seeds