Summer/Winter shipping notice: Due to extreme low or high temperatures commonly experienced during these seasons I am not able to guarantee live delivery on cultures. Please refer to the safe shipping temperature range that is listed for each culture on the individual product page and ensure that your forecast, 1-2 weeks out, is expected to be within that range. For customers in urgent need of cultures and willing to take a chance I will still continue to ship cultures if ordered during times of extreme cold or warm weather.