rootbeer is made from sassafras roots. sassafras is also a natural blood thinner and sassafras tea was recommended to heart patients before the days of the current meds. that and foxglove tea is what kept folks alive... don't know what is in the sassafras, but foxglove has digitalis
that was also a way to poison folks without the poison being "obvious" as the symptoms of digitalis overdose is severe, chronic loose bowels.
back to your original question, pheobe, you can grow sassafras... in the south, it is considered a "
weed tree" as it is mostly spindly and weak. i want to say it grows kinda like dogwoods... i used to have a gazillion of them on my fence line in the house i first owned.
the only
trees i had were sassafrass, one dogwood, one oak, and 10 pecans.
you cut the lateral roots, rinse them well, and then you can boil them or just let them soak for a few days. that is what gives rootbeer the dark color and the flavor.