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.
Save. Himalayan blue poppies are one of the few flowers that produce an intense sky-blue blossom. In their native location in China, they can grow to more than 6 feet tall; in other locations, they average 20 to 28 inches tall.lace the poppy in the hole, add soil to fill in the hole and tamp down gently to remove air bubbles. Water gently to settle the soil. Space the poppies 18 to 24 inches apart. Water the poppies regularly, but do not over water; waterlogged plants can suffer from crown rot.