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.
After a day at a botanical garden, I have questions about how far apart to plant large trees-bald cypresses, dawn redwoods, deodara cedars, oaks, maples, tulip polars. The tags usually say to plant these trees at least 25 feet apart, often 50 feet apart.Since the trees I'm planting are small (i.e., white oak: 2.5-3 ft; maples: 6-8 ft; tulip tree: 4-5 feet; bald cypresses: 5 to 8 feet), these trees are nearly lost in the 4-5 acre field between the house and road.he first thing I noticed was a group of tall deodara cedars planted on a berm - 10-12 ft apart. A group of 4 dawn redwoods was 6 feet apart. At the entrance to the main building are two groves of dawn redwoods - 9-12 feet apart.