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.
Sowing Rutabaga Seeds: Sow Rutabaga seeds 1/2 inch deep, two to four inches apart, in rows 1 1/2 to two feet apart. Plant seeds in double rows to conserve space in your home garden. Time the sowing of seeds for a fall harvest. This can vary significantly, depending upon the length of the season in your area.