Agave

Are these yours?
I have a few Agaves and succulants etc. these look good.

Yes! they get an unheated greenhouse, insulated with bubblewrap all winter and then are outside all summer. They do get regular nitrogen feeds.
We have a large grey one outside on my 'herb bank' - steep subsoil! which is doing well - a variegated one succumbed to the damp! We find that regular feed and watering - but NEVER to let them stand in water is the key.

Mine have the same treatment i.e. cold greenhouse with bubble wrap, outside in the sunshine. But I have not given them a Nitrogen feed.
I will this spring.

Well - we all like to eat and drink well don't we!!!