How to Fertilize large-thorned agave?
Very dilute low nitrogen feed during warm growth only

large-thorned agave · Agave macroacantha
Grow under glass in cactus compost in full light. Water freely in summer, giving a low-nitrogen feed three or four times. Water less in autumn and keep dry in winter. Can move outdoors for summer. See houseplant cacti and succulent cultivation for further information
Very dilute low nitrogen feed during warm growth only