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.
Remove all rocks and roots. Dig in compost into the top 6 inches of soil. Plant habanero transplants about 15 inches apart after your last frost date. You can plant them in rows about 2 feet apart, or in a block formation 1 foot from each other for an intensive planting in a raised bed.