...don't get me started on this subject...
It is great if a vendor shares this info right on their site. I am not thrilled with the whole concept of having to email and ask about each and every tea I might be interested in...too much of an inconvenience. I want to info up front.
Also, when it is right on the site, I tend to trust that more.
But otherwise, you have to ask. I do not buy any tea w/o at least knowing harvest info.
For most Keemun, I actually like them more with a little aging.