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.
Okra should be transplanted at 3- to 4-leaf stage in double rows 15 to 18 inches apart and 12 inches between plants. If drip irrigation is used in conjunction with plastic mulch, the tube should be centered between the rows and buried approximately 2 to 3 inches deep.