Spices requiring klp

What spices require a Pesach hechsher?

Only blended spices need reviewing to confirm the ingredients are all non chametz.
One common one that often has wheat flour is Zaatar. But any spice blend can be an issue. Read the ingredients and see what’s in there. If you are not sure, post them here.
A basic spice like turmeric, garlic, black pepper and so on, is 100% of whatever the spice is and doesn’t pose any problem.

Ashkenazim should avoid mustard spice.