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.
See the Bramble Production Guide.) Set plants at the same depth as they were in the nursery, generally in a trench about 10 inches deep. Spread the roots so that theyâre not balled up; plants should have a good 10 inches of root growth. Space plants 20 to 30 inches apart in the row.