This flower is the easiest to grow; just stick a cutting in and it will take root, and its blooms are especially beautiful.

Moss rose (Portulaca grandiflora): Moss rose loves sunlight very much; the stronger the sunlight, the more vivid its flowers and the more blooms it produces. Moss rose likes a warm, dry environment with plenty of sunlight, and its colors are extremely vivid with a great many color varieties. Whether by cuttings or by seed, it is very easy, and it can survive in any environment.
Aptenia cordifolia: Aptenia cordifolia likes plenty of sunlight and a dry environment, and likes good ventilation. In the hot summer, it should be shaded appropriately, while in the other seasons it needs plenty of light so it can grow better. Aptenia cordifolia is also very simple to care for, and propagation by cuttings is the easiest: just insert it into the soil and leave it in a cool place to grow.
Spider plant (Chlorophytum comosum): The spider plant is a common houseplant. Spider plants come in quite a few forms, and they are extremely tolerant of shade, so they are very simple to care for. Spider plant propagation by cuttings can be done in all four seasons: the clustered stems and leaves on the spider plant's stolons can be planted directly into a flowerpot, watered thoroughly, and left in a cool place to grow.