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.
1 In four years reaching up to 30 ft. 2  Planting Poplar from unrooted cuttings is common practice and has a high success rate .1ft cuttings are placed in a 9 inch per made hole. (the same process as planting willow cuttings). 3  Poplar can be planted as 1.5m+ rod cuttings. We advise plating Poplar with a planting space of 1m rather than the 75cm with willow if plating to form logs. 2  Both the planting of Poplar and Willow need some preparation to the ground first to eliminate competition form weed and grass.