How to Fertilize old man of the Andes?
Balanced perennial feed every four weeks from spring through summer
old man of the Andes · Oreocereus celsianus
Under glass grow in cactus compost in a well-lit position; water regularly from spring to summer to keep the compost just moist, and apply a liquid fertiliser monthly. Keep dry at other times. For more information see houseplant cacti and succulents cultivation
Balanced perennial feed every four weeks from spring through summer