Which is best for growing tomatoes? Epsom salt or baking soda?
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Epsom salt...it’s actually magnesium, which helps to set flowers that attract the pollinators. Later in the life of tomato plants you might want to ad lime arround the tomato plants...it’s calcium...and will help keep blossem end rot away.
My grandmother always mixed in Epsom salts when she planted her tomatoes, I'm not sure how much, it wasn't really much, that is what I remember from back in the sixties.
Epsom salts help "green" up the plant. Baking soda would be helpful for spraying (after it's started setting blooms=fruit) if you have bug/mold / mildew problems
https://plantcaretoday.com/use-epsom-salt-sweeter-tastier-tomatoes.html
https://thegardeningcook.com/sweet-tomatoes/