Crested Myrtillocactus Shriveling: Light and Water Fixes

Dinosaur Back Cactus Crest Shriveling Indoors in Texas

2-year-old Myrtillocactus geometrizans crest shriveling; arm (4–5") bright green and leaning. Indoors, DFW area.

Issues

• Indoors = insufficient intense light (unless supplemental).
• Do NOT put in direct sun if unacclimated (will die).
• Possible underwatering.

Fixes

• Add "Superthrive" to water; soak well, then dry completely.
• Position grow lamp above for 15+ hrs/day.
• No direct sun until acclimated.