No. Normally green teas and and green style oolongs do not mature well. Depending on the selection, any of such tea peaks at a certain time after production processing. Some a couple of weeks, some a couple of months. If kept in room temperature, they very gradually decrease in quality. The best way to maintain their maximum taste profile for you is to keep them in the fridge. Take them out to return to room temperature before contact with air again for best enjoyment. We store our stocks in the chill until packing for your order. That is why they always come to you fresh.