Pachycereuspringlei (Cardon gigante) is a group of eye-catching succulents that are beloved by succulent lovers and cacti alike for their distinctive architecture and huge size. Check to see if your Pachycereus Pringlei turns yellow or has a distorted look. My Resource Page has recommendations for where you can buy these and other succulents online. If the roots appear light brown, this is a sign that they have probably dried out. Euphorbia prefers natural sunlight over artificial light so should not be kept in dark places.