30 cactuses from 30 different seeds, 30 times testing. It's gonna be a great amount of bitterness. I wonder is there some kind of test I could do with samples from the cactus? Are there some morphological characteristics that could give me a clue? I see some are bluer than others, some have a V shape over the areols, some have shorter or longer spines, some are thicker or their ribs are thicker, some have a gap between their ribs, some don't.