Summer shipping notice: Due to high temperatures commonly experieced during the summer months I am not able to guarantee live delivery on worm cultures at this time. For customers in urgent need of cultures and willng to take a chance I will still continue to ship cultures upon request. As a general guideline... microworms tend to ship well in all but the hottest of heat waves. Grindal worms are more sensitive to heat and the temperature in a mailbox or mail truck on a hot day could reach a lethal level for them. White worms are the most heat sensitive and will perish at temperatures much above 27C. I will start guaranteeing live arrival again sometime around the end of September depending on the weather.