Watering:
Water the plant moderately until it’s well established. Once mature, much less water is needed.
Fertilizer:
Fertilize Mexican giant cactus once a month with liquid fertilizer in the growing seasons.
Re-potting:
Remove it from the pot, cut away any dead material from the roots, and replant.
Temperature:
The ideal temperature for Pachycereus Pringlei is above zero degrees Celsius.