Irises.
The Spanish and English Irises want conditions that not everyone can give them. They like shelter without shade, drought in autumn and winter, moisture in spring, sun in summer, and a light, friable soil. If you have a light soil and a south wall, you should certainly put some of these beautiful flowers in, and do not meddle with the bulbs as long as the plants are doing well. Plant at least three inches deep and five inches apart.