There a quite a few agave plants that look similar to this one, but I believe this succulent is Agave salmiana ferox. I love the common name of this plant, the Green Goblet; It’s perfect for the start of October because it sounds “Halloween-y” to me and Halloween is one of my favorite holidays. It grows to be about 4 feet tall by 4 feet wide and originated in Mexico. It is a very adaptable plant, doing well in both sun and shade. It is also heat and drought tolerant. It is becoming an increasingly popular plant to use in landscaping because of these factors. Its leaves are lined with large spines and flowers in early to mid summer, a yellow cup shaped flower that rises above the foliage. I actually first saw this plant at my grandma’s home in Mexico, she had a few in her courtyard. This has always been one of my favorite plants, and I’ve gone through quite a few of the miniature versions. Its supposed to be one of the easiest plants to keep alive, but for whatever reason, I can’t!
My iNaturalist post can be found here.