I'm no plant expert, but when I saw this on the main page I thought how it looked exactly like Giant Milkweed (Calotropis gigantea) except it has white flowers instead of purple. I searched the plant they have it listed as thinking it might be related to milkweed, and the images that come up show a very distinctive flower that doesn't look like this picture. I could be wrong, but I would just like someone smarter than me to double check it. Thanks so much!