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.
For purchased seedlings or blackberry cuttings, you should plan on getting them planted early in the spring once the ground has thawed enough to dig. Space your plants about 3 to 4 feet apart, and give them some extra space to spread out in front and back. Blackberry vines can grow 7 to 10 feet long, if you let them. The vines are going to be thorny, so donât plant your blackberries along a walkway. Dig a hole deep enough to accommodate the roots, and add some compost while youâre at it. Donât choose a low-lying place for your berry plants.