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.
Planting distance The next decision to make is how far apart you want to put these plants. Box balls Clipped balls of box, about 45cm (18in) in diameter and spaced six feet apart, add a formal note to the edge of a riotous, cottage flower border.They also look good where a path runs along the edge of a lawn.lanting distance The next decision to make is how far apart you want to put these plants. Box balls Clipped balls of box, about 45cm (18in) in diameter and spaced six feet apart, add a formal note to the edge of a riotous, cottage flower border. They also look good where a path runs along the edge of a lawn.