i think coppers considered a heavy metal, isnt it .
...anyways i have seeds from a guy who brought them from itialy as well ..they are a heart shaped tomatoe ..pinkish in color, the leafs are much diffrent then the normal toms you find around here ..i love them ..they make the best sandwiches and very little seeds to them ..i've been growing them about 20 yrs now ..i also keep the seeds each yr ..crop rotation is a must in my opinion ..my uncle used to own a greenhouse and my family worked it for yrs ..we used to sell alot of african violets..but also sold many veggies and fruit trees ..i think the best part about growing my own tomatoes is they really taste like a tomatoe..these things they sell in the stores today, for an outrages amount of money, have no taste to them at all..straight organic ferts here ..i use some fish but am starting to get away from using them .i read the fish emultion carrys mercury from the fish they harvest for it. i also use guano blood and bone meal ..no mircle grow here ..my wife uses it for her flowers but has started to move away from it as well..i use neem oil for some bug control ..