tobacco tree leaves Virginia Bright Leaf Blog: From Seed to Leaf:

When this tissue is injured, even from a minor nick or scratch, these blood vessels tend to bleed, sometimes heavily

Paul Butterfield, John Mayall, Muddy Waters, Son House and Howlin Wolf

For his own patients, he recommends alternatives to smoking it -- or anything else

Youll know youre in this era when you catch yourself starting every sentence with okay, hear me out or when youre selling a vision youre only 70% sure will work

If youd been around smoke, you changed your clothes and washed your hands thoroughly before touching anything

However, it is important to avoid prolonged periods of heavy rain or waterlogging, as this can negatively affect plant development and increase the risk of fungal diseases and hence the use of fungicides