Unless you get up very early in the morning or stay up all night, you will miss some of the most spectacular cactus flowers. These are the cactus that bloom only at night. But the time the sun is up and the day begins, the flowers are already closing and by afternoon, they are shriveled remnants of the glory of the night. Who would expect that such gorgeous flowers would bloom only at night? Even if I go to bed late, I always get up early, I don't want to miss anything.