Unlike regular tea, which is from the plant Camellia sinensis, rooibos tea is derived from the plant Aspalathus linearis. I've checked CRC and Star-K and their tea-specific articles don't mention this tea specifically.
Given the similarity in preparation, and the fact that the desired part of the plant to make this tea is the leaf:
- Would it need a hechsher throughout the year?
- Because it's classified as a legume, is it kitniyos, even if the part of the plant used is the leaf, and not the seeds? Would there be concern on Pesach that parts of the seeds would be mixed in with the leaves, or are we less concerned because that might be a sofek and kitniyos is minhag?
Obviously, CYLOR, but I plan to bring the information I get here as part of my shayla.
Thank you in advance!