Areolar Tissue is loose connective tissue that consists of a meshwork of collagen, elastic tissue, and reticular fibres-with many connective tissue cells in between the meshwork of fibres. The fibres that form the mesh structure of areolar tissue include:
Normal growth rates for Emerald Green (Thuja occidentalis 'Smaragd') are between 6 to 12 per year once established and tapering off as they reach about 12' to 15'. I'd be suprised to see more than about 18 per year even in ideal conditions.
Plant Emerald Green arborvitaes approximately 2 to 3 feet apart when planting more than one to create a natural hedge. This spacing allows mature plants to spread out slightly, but prevents root crowding and competition of nutrients and water. The Emerald Green grows 6 to 9 inches a year once established.