Desert Rose : Adenium obesum

Desert Rose: Adenium obesum is a poisonous species of flowering plant belonging to the tribe Nerieae of the subfamily Apocynoideae of the dogbane family, Apocynaceae. It is native to the Sahel regions south of the Sahara, tropical and subtropical eastern and southern Africa and also the Arabian Peninsula.
Desert rose is a slow-growing plant not growing more than a foot a year. The desert rose plant has a bonsai appearance. Under the right climate conditions with optimum watering, light, and liquid fertilizer, it can grow up to nine feet tall and 4 feet wide. While in interior spaces, the container-grown desert rose only grows up to a few feet in height and width.

The bloom time for desert rose plants is summer, when they get six to eight hours of sunlight with adequate liquid fertilizer applications. Desert rose looks like a bonsai; it has a thick, swollen truck (that holds water during times of drought) and shiny, dark green leaves.

If your plant is in a pot. The most precise way to decide whether your Desert rose needs water is to plunge your finger into the soil. If you notice that the first two to three inches of soil have become dry, it is time to add some water.

If you grow your Desert rose outdoors in the ground, you can use a similar method to test the soil. Again, when you find that the first few inches of soil have dried out, it is time to add water. During the spring and early fall, this method will often lead you to water this plant about once every week. When extremely hot weather arrives, you may need to increase your watering frequency to about twice or more per week. With that said, mature, well-established the Desert rose can show an admirable ability to withstand drought.