Basic structure of dicotyledonous stem-Sunflower stem. Inner structure of dicotyledonous stem reveals epidermis, cortex and stele. Epidermis. Epidermis is protective in function and creates the outermost layer of the stem. Epidermis is a single layer of parenchymatous rectangular cells.
Culture. Plumbago is propagated from cuttings in the summer, but you can also grow it from seed. Plant plumbago in light, sandy, well-drained soils, spacing each shrub 36 to 60 inches apart to allow room to grow. If spaced properly, blue plumbago will naturally cascade in a fountain shape.
Plumbago is an extremely reliable, resilient plant which has been popular for home gardens as well as for commercial landscapes for many years. Plumbago may be found in gardens all over the world, and was apparently popular as a standard plant in Europe. In nature plumbago is a scrambling shrub, about 3m x 3m. It grows in scrub and thicket (valley bushveld). The new growth is bright green, darker when mature.