New to Blue Agaves -What is going on with my plant? Too much to little water, something else?

Question

Just acquired this plant. Planted it in cactus soil and placed it in the sun. It has steadily looked worse what am I doing wrong. Leaves are starting to curl now.

Answer 1

Use a potting mix of equal parts compost, good potting mix or garden soil, and either gravel, pumice, or sharp sand. Do not use peat moss; its acidity and its water-holding properties are not desirable for growing agaves.
Plant agaves so that the crown is well above the soil line and will stay that way as the soil subsides after watering. Feed with liquid fertilizer once a month during the growing season.
Provide plenty of light. Many agaves will tolerate full sun in containers, even in the desert, if kept sufficiently watered. Always water completely, and test to be sure the container is at least half dry before watering again.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/agave/growing-agave-plants-in-pots.htm