Agave eggersiana growing outside in Missouri, USA. When night time temps are below 60f/15c I take it inside. Last year while outside it turned this light green that I don’t think seems very healthy and I was hoping it’d improve this summer but it hasn’t. Maybe I need to add nitrogen to the soil? Pot drains well.
It almost looks like light shock, how long has it been outside? How often do you fertilize? When was the last time it was repotted? How often do you water, and does the soil dry out between waterings?
Nice brasiliopuntia (I think).