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.
According to âShrubs and Woody. Vines of Missouriâ, wild plum can propagate by root sprouts to form tickets or a small tree to 20. feet with spreading more or less hanging branches. Space plants eight feet within rows and 16. feet between rows for farmstead and feedlot windbreak plantings.