sterilize seeds

sterilize seeds in 0.5 mL 70% EtOH, 0.05% TritonX-100, ~3 min, mild agitation.

Let seeds settle, remove liquid

Replace with sterile water, 3X

Replace water with sterile 0.1% agar, 3X

plate heavily in a line on flattened cellophane (wet it if necessary)

stack plates flat

cover in foil, refrigerate, 48 hours