Peanuts are often found in potting soil & gardening products. Many brands are not safe to use if you have a peanut or tree nut allergy.

Always call a restaurant/bar before you go, ask if they, ‘have any peanuts or peanut oil in their kitchen'. Do not visit if there are peanut

I had not thought about there being a chance of an allergic reaction and dogs and how common peanut butter is in dog treats until I reacted.