I know you guys are quite helpful, I've gotten plenty of information from this forum before creating my account today, so I'm sure someone can help! I have some potted basil outside, 2 stalks in a pot, and one of them has these "granules" on the stem. They're brown and hard. I scraped some off (it wasn't easy) and they're just...hard, brown bits. What is it? Should I not eat this basil? Thanks!