I really enjoy this space. It's open and enclosed at the same time. It could be indoor or outdoor, depending on the location and number of windows. It could be front, back, side yard and still work well.
Evening Primrose Oenothera missouriensis from Growing Colors - Low-growing perennials with cup-shaped flowers that bloom all summer. Plants tolerate hot, dry conditions and prefer well-drained soil. Use near the front of the border or in rock gardens. Height 9-10". Spacing 15-18"
Add 1 tsp. of liquid food coloring to 1 cup of water. Drizzle the colored water onto the soil surrounding the base of a plant. Wait 24 hours for the water to absorb. Apply another identical dose if the color change was not sufficient.