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.
About Pigeon Pea Seed Growing. Pigeon peas can be grown in most places where there is a lot of sun and very little frost. According to the USDA Plant Hardiness Map, pigeon peas can be grown in zones 9 through 15.Plant seeds one inch deep and 12 inches apart for best results.Plants will germinate in 10 to 15 days, and pods will appear in four months.Pods can be picked fresh for peas or left on the tree until they are dry.lants will germinate in 10 to 15 days, and pods will appear in four months. Pods can be picked fresh for peas or left on the tree until they are dry.