Hornworm problems

Question

Does epsom salt sprinkled around your tomato plants keep hornworms away?

Answer 1

While Epsom salts are used by some people to repel hornworms, another favorite treatment is neem oil: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
Another good method is to simply pick off the worms and drown them in a bucket of water when you see them.