AlexZorach wrote:This is interesting...the Xin Yan Mao Jian that I bought from TeaVivre did not last long in its optimal state. I still have a little of the tea left but now, less than two months after opening it, it has acquired numerous "off" aromas and I find it is not as enjoyable. It was delicious at first. And I stored it in a clipped bag kept within a small airtight tin.
The other two green teas I received from TeaVivre, which had leaf that was not as thin or wiry, have stayed fresh better.
What are the other two teas?
This is possibly due to factors other than dryness of the tea. Some tea naturally expire faster than others, even when made perfectly. Usually even fast expiring tea won't expire in just few months, and the "off" aroma doesn't sound good. Could it be due to room temperature and other storage conditions?
Xin Yang Mao Jian and some other "fuzzy" teas such as Bi Luo Chun seem to be some fast expiring teas (but usually still have a shelf life up to several months). I once compared several 1 year old teas with good processing and good storage, and my impression of liveliness is approximately like this:
fuzzy bud teas < a few non fuzzy Zhejiang green teas (such as Long Jing) < a few Anhui green teas (such as Huang Shan Mao Feng) < low grade well made pan fry teas (such as those "brow" teas) < Lu Shan Cloud Mist
And generally Yunnan green tea seems to be one of a kind and has much longer shelf life than many other green teas.
So in my experience, Xin Yang Mao Jian belong to the category with shorter shelf life and easier to be contaminated or lose flavor, compared with other teas of similar grade.