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.
Increasing the growth rate of Blue Spruce. Discussion in 'Homeowner Helper Forum' started by cmontana, Apr 25, 2005. I planted four Blue Spruce trees last spring. They were 6 foot tall (including the root ball) and we planted them about eight feet apart in a raised berm that is eight feet across and two feet tall in the center. They seem to be doing well, but I'm wondering what I can do to boost their growth rate.