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.
6. Transplant blue poppy seedling into pots once they grow their first set of true leaves. Fill 4-inch plastic pots with the same growing mixture used during germination, inserting your finger to make a hole for each seedling. Gently knock the seedlings out of the seed tray and ease them apart.. Keep the soil moist and the seeds under grow lights until germination, which is usually about two to four weeks. Keep the soil moist by giving it a fine mist of moisture once or twice daily.