How is it that you guys know all this about Neem? Are you scientists, or botanists? And just because you can eat something safely, it doesn't mean that you can smoke it safely. Don't spray neem on any plant part that you intend to later smoke, especially the flowers. Stop, or risk health problems when you're finally my age! I can't tell you how many things I did when I was young that seemed harmless, that now that I'm older I wish I hadn't done & am finally paying for!