It is possible to get sunflower seeds and products made from sunflower seeds, such as oil, that are hechshered kosher l'Pesach. However, all of these products are considered kitniyot and therefore, the majority of Ashkenazi Jews will not eat them.
There are kosher for Passover sunflower seeds. However, they are classified as kitniyot and are not eaten by Ashkenazi Jews during Passover.
There is nothing about kosher sunflower seeds that is explicitly haram. As long as the sunflower seeds were not dipped in alcohol of some type (which is rare), they should be permissible.
For Ashkenazim: no, because they have a custom of abstaining from legumes, peas, seeds, rice (etc.) on Passover. For Sephardim: yes, if the label has a certification of being kosher for Passover.
Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds. Sunflower seeds.
It would have to be certified kosher for Passover.
The label has to say "Kosher for Passover"
Yes, only if they are specifically certified kosher for passover. You can find kosher for Passover olives at any Jewish supermarket
It can be, it would require a valid Passover hechsher.
Yes, it can be since it is made from wine, which can be Kosher for passover if created under appropriate supervision. The bottle would require a kosher for Passover hechsher.
Vitamin C, Thiamin, Niacin, Vitamin B-6, Folate, Vitamin A, Vitamin E, etc.
If you were able to find corn vinegar that is certified kosher for Passover, it would be kitniyot which means that the majority of Ashkenazi Jews would not use it.
Sunflower seeds; these seeds are edible
There are kosher food companies that are now making gluten-free products Kosher for Passover and all-year-round. However, something being gluten-free has no bearing on whether or not it is Kosher or Kosher for Passover.