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.
Step 5 - Planting distances can range from 90cm apart to 3m apart depending on the variety, so you will need to check the seed packet. At each planting station, pile the soil into mounds about 15cm (6) high. Plant each pumpkin plant on top of a mound to ensure good drainage and keep them well watered until they are established.