This year it is important to remember that it is shemittah and fresh produce is being exported from Israel that may very well have kedushas sheviis. It is definitely important to check all vegetable products you buy and even consider getting a shemittah calendar to know when various items become problematic as far as this issue goes. And, most importantly, ask your LOR what you should do with anything you bought that you think might have kedushas sheviis.
As a side note, 3 shemittahs ago, I received a bottle of wine from a Shabbos guest who did not know about products sold with the heter mechirah being problematic for people who do not hold from it. We asked a shailah and were told that there was nothing to do – no pouring it down the sink or drinking it or anything. We basically have a bottle of wine to pass down to our descendants.