Pesach Questions

Regarding fresh pre-cut vegetables: Can these be used on Pesach without special certification? I'm referring to bagged lettuce, cabbage, carrots, baby carrots, pre-chopped broccoli and cauliflower, and other things like that. And what about frozen vegetables like broccoli and cauliflower? And while we're at it, what about the cauliflower "rice" (finely chopped cauliflower) that you can get either frozen or fresh - can this be used on Pesach without special Pesach supervision? Thanks!

Generally, bagged salads and pre-cut vegetables require Pesach hashgacha (concerns about preservatives). If certified is unavailable and contains no kitniyot or additives, then buy it before Pesach. Raw baby carrots are acceptable if free of additives. RATN