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 makes a good, fast growing exclusion zone or bush-clump plant for attracting birds which like dense plant growth. I have mentioned that butterflies love to gather on the plumbago so your landscape can easily be transformed into a nature preserve simply by planting this newest Texas SuperStar called plumbago.